Lex Fridman Podcast - Paul Krugman: Economics of Innovation, Automation, Safety Nets & Universal Basic Income

Episode Date: January 21, 2020

Paul Krugman is a Nobel Prize winner in economics, professor at CUNY, and columnist at the New York Times. His academic work centers around international economics, economic geography, liquidity traps, and currency crises. This conversation is part of the Artificial Intelligence podcast. If you would like to get more information about this podcast go to https://lexfridman.com/ai or connect with @lexfridman on Twitter, LinkedIn, Facebook, Medium, or YouTube where you can watch the video versions of these conversations. If you enjoy the podcast, please rate it 5 stars on Apple Podcasts, follow on Spotify, or support it on Patreon. This episode is presented by Cash App. Download it (App Store, Google Play), use code "LexPodcast".  Here's the outline of the episode. On some podcast players you should be able to click the timestamp to jump to that time. 00:00 - Introduction 03:44 - Utopia from an economics perspective 04:51 - Competition 06:33 - Well-informed citizen 07:52 - Disagreements in economics 09:57 - Metrics of outcomes 13:00 - Safety nets 15:54 - Invisible hand of the market 21:43 - Regulation of tech sector 22:48 - Automation 25:51 - Metric of productivity 30:35 - Interaction of the economy and politics 33:48 - Universal basic income 36:40 - Divisiveness of political discourse 42:53 - Economic theories 52:25 - Starting a system on Mars from scratch 55:11 - International trade 59:08 - Writing in a time of radicalization and Twitter mobs

The following is a conversation with Paul Krugman, Nobel Prize winner in economics, professor CUNY, and colonist at the New York Times. His academic work centers around international economics, economic geography, liquidity traps, and currency crises. But he also is an outspoken writer and commentator on the intersection of modern-day politics and economics, which places him in the middle of the tense, divisive, modern-day politics and economics, which places him in the middle of the tense, divisive, modern-day political discourse. If you have clicked this like on this video, I started writing a comment of derision before listening to the conversation.

I humbly ask that you please unsubscribe from this channel and from this podcast. Not because you're conservative, a libertarian, a liberal, a socialist, anarchist, but because you're not open to new ideas, at least in this case, especially at its most difficult, from people with whom you largely disagree. I do my best to stay away from politics of the day, because political discourse is filled with a degree of emotion and self-assured certainty that to me is not conducive to exploring questions that nobody knows the definitive right answer to. The role of government, the impact of automation, the regulation of tech, the medical system, guns, war, trade,

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So big props to the cash app engineers for that. I like it when tech teams solve complicated problems to provide in the end a simple effortless interface that abstracts away all the details of the underlying algorithm. And now here's my conversation with Paul Krugman. Here's my conversation with Paul Krugman. What does a perfect world atopia from an economic perspective look like? Wow, I don't really, I don't believe in perfection.

I mean, somebody once said that his ideal was slightly imaginary Sweden. I mean, I like an economy that has a really high safety net for people, good environmental regulation, and something that's kind of like some of the better run countries in the world, but with fixing all of the smaller things that are wrong with them, what about wealth distribution? Well, obviously, totally know, totally quality is Neither possible nor I think especially desirable, but I think you want one where Basically one where nobody is nobody is hurting and where everybody lives in the same material universe everybody Is basically living in in the same society. So I think it's a bad thing to have people who are so wealthy

that they're really not in the same world as the rest of us. What about competition? You see the value of competition when what maybe it's limits? Oh, competition is great when it can work. I mean, there's a, yeah, I remember. I'm old enough to remember when there was only one phone company and there was really

limited choice. I think the arrival of multiple phone carriers and all that has actually been a really good thing. That's true across many areas, but not every industry is not every activity suitable for competition. There are some things like healthcare where competition actually doesn't work. And so it's not one size fits all. That's interesting. What does competition not work in healthcare?

Oh, there's a long list. I mean, there's a famous paper by Kenneth Arrow for 1963, which still holds up very well. Where it kind of runs down the list of things you need for competition to work well. Basically, both sides to every transaction being well informed, having the ability to make intelligent decisions, understanding what's going on, and healthcare fails on every dimension.

You know, you do healthcare, so not health insurance, healthcare. Well, both healthcare and health insurance. Health insurance being part of it, but no, health insurance is really the idea that there's effective competition between health insurers as well, and health care. I mean, the idea that you can compare a shop for major surgery is just, you know, to when people say things like that, you wonder, are you living in the same world I'm living in? You know, that piece of well informed,

that was always an interesting piece for me, just observing as an outsider, because so much beautiful, such a beautiful world is possible and everybody's well informed. A question for you is how hard is it to be well informed about anything, whether it's healthcare or any kind of purchasing decisions or just life in general in this world? Oh, information, you know, it varies hugely. I mean, there's more information at your fingertips than ever before in history. The trouble is, first of all,

that some of that information isn't true. So it's really hard. And then some of it is just too hard to understand. So if I'm buying a car, I can actually probably do a pretty good job of looking up, you know, going to consumer reports reviews, you can get a pretty good idea of what you're getting when you get a car. If I'm going in for surgery, first of all, you know,

you're fairly often it happens when without you're able to be able to plan it, but also, there's a re- medical school takes many, many years and going on the internet for some advice is not usually a very good substitute So speaking about news and not being able to trust certain sources of information How much disagreement is there about I mentioned utopia? Perfection in the beginning, but how much disagreement is there about what utopia looks like or is most of the disagreement simply about the path to get there? Oh, I think there's two levels of disagreement.

One, maybe not utopia, but justice. What is a justice society? And that's, there are different views. I mean, I teach my students that there are, you know, broadly speaking two views of justice. One, it focuses on outcomes you know, ask your, it's a just society is the one you would choose if you were trying to what the one that you would choose to live in if you didn't know who you're gonna be. That's kind of John Roles. that you would choose to live in if you didn't know who you're going to be. That's kind of John Rawls.

The other focus is on process. That justice society is one in which there is no coercion, except we're absolutely necessary. There's no objective way to choose between those. I'm pretty much a Rawlsian, and I think many people are. Anyway, there's a legitimate dispute about what we mean by a just society anyway. But then there's also a lot of disputes about what actually works. There's a range of legitimate dispute. I mean, any card carrying economist will say that incentives matter, but how much do they

matter? How much does a higher tax rate actually deter people from working? How much does a stronger safety net actually lead people to get lazy? I have a pretty strong view that the evidence points to a conclusions that are considerably to the left of where most of our politicians are, but there is legitimate room for disagreement on those things. So you've mentioned outcomes. What are some metrics you think about the keeping mind, like the genicoefficient, but really anything that measures how good we're doing, whatever

we're trying to do, what are the metrics you keep an eye on? Well, I'm actually, I'm not a fan of the genic coefficient, not because the genic coefficient. What is the genic coefficient? Okay, the genic coefficient is a measure of inequality. And it is commonly used because it's a single number. It usually tracks with other measures, but the trouble is there's no sort of natural interpretation of it. You ask me what does the society with a genie of .45 look like as opposed to a society with a genie of .25 and I can kind of tell you, you know, when the 0.25 is Denmark and 0.45 is Brazil,

but it's that's a really, there's no sort of easy way to do that mapping. I mean, I look at things like what is, first of all, things like what is the income of the, the, the median family, what is the income of the top 1% how many people are in poverty by various measures of poverty. And then I think you want to look at questions like how healthier people, how how is life expectancy doing and how satisfied are people with their lives because there is it that that that has sounds like a squishy number not so much happiness in terms of the life satisfaction is a better measure than happiness but life satisfaction that varies quite a lot and I think it I think it's meaningful if not too rigorous to say, look, according to that kind of, according

to polling, people in Denmark are pretty satisfied with their lives and people in the United States, not so much so. And of course, Sweden wins every time. No, actually Denmark wins these days. Denmark and Norway tend to win these days. Sweden doesn't do badly, but they're there. It's none of these are perfect, but look, I think by and large, there's a bit of a pornography test. How do you know a decent society? Well, you kind of know it when you see it. Where's America stand on that? We have a remark. Our society, I mean, there are

a lot of virtues to America, but there's a level of harshness, brutality, and ability for somebody who just has bad luck to fall off the edge that is really shouldn't be happening in a country as rich as ours. So we have somehow managed to produce a crueler society than almost any other wealthy country for no good reason. What do you think is lacking in the safety net that the United States provides? You said there's a harshness to it. And what are the benefits and maybe limits of a safety net in a country like ours? Well, every other advanced country has some universal guarantee of adequate healthcare. The United States is the only place where citizens can actually fail to get basic care because they can't afford it.

It's not hard to do, everybody else does it, but we don't. We've gotten a little bit better at it than we were, but still, that's a big deal. We have remarkably weak support for children. Most countries have substantial parents of young children get much more support elsewhere. They get often nothing in the US. We have limited care for people, long term care for the elderly is a very hit and miss

thing. But I think that the really big issues are that we don't take care of children who make the mistake of having the wrong parents, and we don't take care of people who make the mistake of getting sick. And those are things that a country, a rich country should be doing. Sorry for sort of a difficult question, but well, you just said kind of, um,

feels like the right thing to do in terms of just a just society. But is it also good for the economic health of society to take care of, to care the people who are the unfortunate members of society? Um, by and large, it looks like large, it looks like doing the right thing in terms of justice is also the right thing in terms of economics. If we're talking about a society that has extremely high tax rates that deter, remove all incentives

to provide a safety net that is so generous that why bother working or striving. That could be a problem, but I don't actually know any society that looks like that, even even in European countries with very generous safety nets people work and then innovate into all of these things. And there's a lot of evidence now that lacking those basics is actually destructive that children who grow up without adequate health care, without adequate nutrition, are developmentally challenged. They don't live up to their potential as adults. So the United States actually probably pays a price. We're harsh, we're cruel, and we actually make ourselves poorer as a society, not just

the individuals, by being so harsh and cruel. Okay, so invisible hand, Smith. Where does that fit in? The power of just people acting selfishly and somehow everything taking care of itself to where the economy grows, nobody, there's no cruelty, no injustice that the markets regularly themselves. Is there power to that idea and where it limits? There's a lot of power to that. I mean, there's a reason why I don't think sensible people want the government running steel mills

or they want the government to own the farms. The markets are a pretty effective way of getting incentives aligned, of inducing people to do stuff that works. And the invisible hand is saying that people farmers aren't growing crops because they want to feed people. They're growing crops because they can make money by it. But it actually turns out they have a pretty good way of getting, of getting agricultural products grown. So the invisible hand is an important part, but it's not,

there's nothing mystical about it. It's a mechanism. It's a way to organize activity, which works well given a bunch of preconditions, which means that it actually works well for agriculture, work well for manufacturing. It works well for many services. It doesn't work well for health care.

It doesn't work well for education. So there are having a society which is kind of three quarters, indiscible hand, and one quarter visible hand seems to be something, something on that order seems to be the balance that works best. It's just, you don't want to romanticize or make something mystical out of it. It's just, this is one way to organize stuff that happens to have broad but not universal application. So then forgive me for romanticizing it, but it does seem pretty magical that, you know,

I kind of have an intuitive understanding of what happens when you have like 5, 10, maybe even 100 people together, the dynamics of that. But the fact that these large society of people for the most part acting in a self-interested way and maybe electing representatives for themselves, that it all kind of seems to work, it's pretty magical. The fact that there's, you know, that right now there's a wide assortment of fresh fruit and vegetables. At the local markets up and down the street, who's planning that and the answer is nobody. That's the invisible hand it work and that's great. And that's a lesson that Adam Smith figured out

more than 200 years ago and it continues to apply. But even Adam Smith has a section of his book about why it's important to regulate banks. So the invisible hand has its limits. Yeah, and that example is actually powerful one in terms of the supermarket and fruit. That was my experience coming from Russia, from the Soviet Union, is when I first entered the supermarket and just seeing the assortment of fruit bananas. Yeah.

I don't think I've seen bananas before, first of all, but just the selection of fresh fruit was just mind blowing it beyond words. And the fact that like you said, I don't know what made that happen. Well, there is some magic to the market. But the as as showing my age, but you know, the old movie quotes sometimes the magic works and sometimes it doesn't. And you have to have some idea of when it doesn't. So how do you get regulation, right? What can government at its best do? Government, strangely enough in this country today, seems to get a bad rap. Like everyone seems to, everybody's against the government. Yeah. Well, a lot of money has been spent on making people hate the government. But

the reality is government does something pretty well. I mean, we, government does health insurance pretty well. So much so. I mean, given our anti-government bias, it really is true that there are people out there saying, don't let the government get its hands on Medicare. Right. So government, people actually love

the government health insurance program far more than they love private health insurance. Basic education, it turns out that your local public high school is the right place to have students trained and private for certainly for profit education is a is a by and large a nightmare of rip-offs and and and grift and and people not getting what they they thought they were paying for. It's in judgment case and it's funny there are things I mean everybody talks there's a talks about the the DMV as being you know, do you want the economy? Actually, my experience is that the DMV have always been positive. Maybe I'm just going to the right DMVs, but in fact, a lot of government works pretty well. So, to some extent, you can do these things on a priori grounds. You can talk about the logic of why health care is not going to be handled well by the market, but partly it's just experience.

We tried, or these some countries have tried nationalizing their steel industries that didn't go well, but we've tried privatizing education, and that didn't go well, so you find out what works. What about this new world of tech? How do you see, what do you think works for tech? Is it more regulation or less regulation? There are some things that need more regulation. I mean we're finding out that The world of social media is is one in which competitive forces aren't working very well and trusting the companies to regulate themselves aren't working very well and trusting the companies to regulate themselves isn't working very well. But I'm on the whole, a tech skeptic,

not in the sense that I think the tech doesn't work and it doesn't do stuff, but the idea that we're living through greater technological change than ever before is really an illusion. We've ever since the beginning of the Industrial Revolution, we've had a series of ethical shifts in the nature of work and in the kinds of jobs that are available.

And it's not at all clear that what's happening now is any bigger or faster or harder to cope with than past shocks. It is a popular notion in today's sort of public discourse that automation is going to have a huge impact on the job market. Now, there is something, something transformational happening now. Can you talk about that maybeting a little bit more do you not see the software revolutions happening now With with machine learning availability of data That kind of automation being able to sort of process clean find patterns in data and you know

You don't see that disrupting any one sector to a point where there's a huge loss of jobs. There may be some things. I mean, actually, translators, there's really reduced demand for translators because we've machine translation ain't perfect but it ain't bad. There are some kinds of things that are changed, but it's not overall productivity growth has actually been slow in recent years. It's been much slower than in some past periods. So the idea that automation is taking away all the jobs, the counterpart would be able to produce stuff with many fewer workers than before. And that's not happening. There are a few isolated sectors. There are some kinds of jobs that are going away, but that keeps on happening. I mean, the New York City used

to have thousands and thousands of longshoremen taking stuff off ships and putting them on ships. They're almost all gone now. Now you have these giant cranes taking containers on and off ships and Elizabeth New Jersey. That's not robots. It doesn't sound high tech, but it actually pretty much destroyed an occupation. Well, you know, it wasn't fun for the longshoremen to say the least, but it's not, we coped, we moved on, and that sort of thing happens all the time. You mean farmers? We used to be a nation which was mostly farmers.

There are now very few farmers left. The end reason is not that we've stopped eating, it's that farming has become so efficient that we don't need a lot of farmers. And we coped with that too. So the idea that there's something qualitatively different about what's happening now, so far isn't true. So yeah, your intuition is there is going to be a loss of jobs, but it's just a thing that just continues.

So, you know, there's nothing qualitatively different about this moment. Some jobs will be lost, others will be created, as has always been the case so far. I mean, maybe there's a singularity, maybe there's a moment when the machines get smarter than we are and SkyTech kills us all or something, right? But that's not visible in anything we're seeing now. You mentioned the metric of productivity. Could you explain that a little bit? Because it's a really interesting one. I've heard you mentioned that before the new connection with automation. So what is that metric? And

if there is something qualitatively different, what should we see in that metric? Well, okay. Productivity, first of all, production. We do have a measure of the economy's total production, real GDP, which is itself, it's a little bit of a construct because it's quite literally, it's adding apples and oranges. So we have to add together various things, which we basically do by using market prices, but we try to adjust for inflation. But it's a reasonable measure of how much the economy is producing.

So it's a good, sorry to interrupt, it's a good, zen service. It's a good service, it's everything. Okay. Productivity is divide that total output by the number of hours worked. So we're basically asking how much stuff does the average work or produce an hour of work.

And if you're seeing really rapid technological progress, then you'd expect to see productivity rising at a rapid clip, which we did for the generation of World War II productivity rose 2% a year on a sustained basis. Then it dropped down for a while, then there was a decade of fairly rapid growth from the mid 90s to the mid 2000s. And then it dropped off again,

and it's not impressive right now. It's a, you're just not seeing an ethical shift in the economy. So let me then ask you about the psychology of blaming automation. A few months ago you wrote, and then you're times, quote, the other day I found myself as I often do at a conference discussing lagging wages

and soaring inequality. There was a lot of interesting discussion, but one thing that struck me was how many of the participants just assumed that robots are a big part of the problem That machines are taking away the good jobs or even jobs in general For the most part this wasn't even a percentage of hypothesis just this part of what everyone knows. Yeah, so why Is maybe can you psychoanalyze our? the public intellectuals or economists or us actually in general

public? Why this is happening? Why this assumption is just infiltrated public discourse? There's a couple of things. One is that in the particular technologies that are advancing now are ones that are a lot more visible to the chattering class. When containerization did away with the jobs of Longshoreman, well, not a whole lot of college professors are close friends with Longshoreman, right? And so we see this one. Then there's a second

thing, which is, we just went through a severe financial crisis in a period of very high unemployment. It's finally come down. There's really no question that that high unemployment was about macroeconomics. It was about a failure of demand. But macroeconomics is really not intuitive. I mean, people just have a hard time wrapping their minds around it. And among mean, people just have a hard time wrapping their minds around it. And among other things, people have a hard time believing that something has trivial as, well, people just aren't spending enough, can lead to the kind of mass misery that we saw in the 1930s or that not quite so severe, but still serious misery

that we saw after 2008. And there's always a tendency to say, it must be something big, it must be technological change. It must be technological change That means we don't need workers anymore. That was a lot of that in the 30s And that's same thing happened after 2008 the assumption that it has to be something some deep cause not something as trivial as a failure of investor confidence and inadequate monetary and fiscal response and the last thing on wages investor confidence and inadequate monetary and fiscal response.

And the last thing on wages, a lot of what's happened on wages is at some level political. It's the collapse of the union movement. It's the policies that have squeezed workers bargaining power. And for kind of obvious reasons, there are a lot of influential people who don't want to hear that story. They wanted to be an inevitable force of nature. Technology is made it impossible to have people earn middle-class wages. And they don't like the story that says, actually, no, it's kind of the political decisions that we made that have caused this income stagnation. And so there are receptive audience for technological determinism.

So what comes first in your view, the economy or politics in terms of what has impact on the other? Oh, well, they, look, everything interacts. Actually, that's one of the rules that I was taught in economics. Everything affects everything else in at least two ways. But the, I mean, clearly the economy drives a lot of political stuff, but also clearly politics has a huge impact on the economy. There, we look at the decline of unions in America and say, well, the world has changed and unions don't have a role, but two thirds of workers in Denmark are unionized. Denmark

has the same technology and faces the same global economy that we do is just a difference in political choices that leads to that difference. So I actually teach a course here at CUNY called the Economist of the Well-Fair State, which is about things like healthcare and retirement and to some extent wage policy and so on. The message I keep on trying to drive home is that, look, all advanced countries have got roughly equal competence. We all have the same technology, but we make very different choices. Not that America always makes the wrong

choices. We do some things pretty well. Our retirement system is one of the better ones, but the point is that there's a huge amount of political choice involved in the shape of the economy. What is a welfare state? Well, welfare state is the old term, but it basically refers to all the programs that are there to mitigate, if you like, the risks and injustices of the market economy. So in the US, the welfare state is Social Security, Medicare, Medicaid, minimum wages, food

stamps. When you say welfare state, my first sort of feeling is a negative one. Well, I like all, I probably generally, at least theoretically, like all the welfare programs. Well, that's, it's been demonized. And to some extent, I'm doing a little, doing a little bit of thumbing my nose at all of that by just using the term welfare state. Although it's not. I see, yeah, they're got you.

But everybody, every advanced country actually has a lot of welfare state, even the U.S. I mean, that's a fundamental part of the fabric of our society. Social security, Medicare, Medicaid are just things we take for granted fundamental part of the fabric of our society. Social security, Medicare, Medicaid are just things we take for granted as part of the scene and so if you There's a lot of there's People on the right wing who are you say oh, it's it's it's all socialism and well, you know words I guess mean what you want them to mean.

And we just today, I told my class about the record that Ronald Reagan made in 1961 warning that Medicare would destroy American freedom. And but it sort of didn't happen. On the topic of welfare is, what are your thoughts on universal basic income? And that's sort of a, not a generic, but a universal safety net of this kind. There's always a trade-off. When we talk about social safety net programs, there's always a trade-off between universality, which is clean, but means that you're giving a lot of money to people who don't necessarily need it, and some kind of targeting, which

makes it easier to deal with the crucial problems with limited resources, but both has incentive problems and kind of political and I would say even psychological issues. So the great thing about social security and Medicare is no questions asked. You don't have to prove that you need them, it just comes. I'm on Medicare, allegedly. I mean, it's run through my New York Times health insurance. But I didn't have to file an application with the Medicare Office to prove that I needed it. It just happened when I turned 65. That's good for dignity.

And it's also good for the political support because everybody gets Medicare. And we can do that with healthcare. To give everybody a guarantee of an income that's enough to live on comfortably, that's a lot of money. What about enough income to carry you over through difficult periods, like if you lose a job, that kind of thing?

Well, we have unemployment insurance. I think our unemployment insurance is too short-lived and too stingy. It would be better to have a more comprehensive unemployment insurance benefit. But the trouble with something like universal basic income is that either the bar is too low, so it's really not something you can live on, or it's an enormously expensive program. And so at this point, I think that we can do far better by building on the kinds of safety and neck programs we have. Food stamps, earned income tax credit, we should have a lot more family support policies.

Those things can deal with, can do a lot more to really diminish the amount of misery in this country. country, um, UBI is something that is being, I mean, it goes kind of hand in hand with, with this belief that the robots are going to take all of our jobs. And if that was really happening, then I might reconsider my views on UBI, but I don't see that happening. So are you happy with this course that's going on now in terms of politics. So you mentioned a few political candidates is the kind of thing going on on both in Twitter and debates and the media through the written words, the spoken word, how do you assess the public discourse now in terms of politics? We're in a fragmented world. So more so than ever before. So at this point,

the public discourse that you see if Fox News is your principal news source is very different from the one you get if you read the New York Times. On the whole, my sense is that mainstream political reporting, policy reporting, is a not too great but be better than it's ever been. Because when I first got into the you know the punted business, it was just awful. Lots of things just never got covered. And if things did get covered it was always both sides You know, it's the line that Comes back from me writing during the 2000 campaign was that if one of the candidates said that the earth was flat The headline would be views different on shape of planet. I mean, it's

And and it's that's less true. There's still a fair bit of that out there, but it's less true than there used to be. And there are more people reporting, writing on policy issues who actually understand them than ever before. So that's good. But I still, I have how much the typical voter is actually informed on clear. I mean, the, the Democratic debates, I think we, I'm hoping that we finally get down to having a, not having 27 people on

the stage or whatever it is they have, but, um, but, you know, they're reasonably substantive, uh, certainly better than before. And while there's a lot of still, you know, theater criticism instead of actual analysis and the reporting, it's not as totally dominant as in the past. Can I ask maybe a dumb question, but from an open mind perspective, when people on the left and people on the right, I think view the others as sometimes complete idiots. What do we do with that? You know, is it possible that the people on the right are correct about what they currently believe? Is that kind of open-mindedness helpful?

Or is this division long-term productive for us to sort of have this food fight? Well, trouble you have to confront is that there's a lot of stuff that just is false out there, and but can man's extensive political allegiance. So the idea, well, both sides need to listen to each other respectfully. I'm happy to do that when there's a view that is worthy of respect, but a lot of stuff is not. So, take economics is something where I think I know something. And I'm not sure that I'm always right. In fact, I know I've been wrong plenty of times. But I think that there is a difference between economic views that are within the realm

of we can actually have an interesting discussion, and those that are just crank doctrines or things that are purely being disseminated because people are being paid to disseminate them. So there are plenty of good serious center right economists that I'm happy to talk to. None of those center right economists has any role in the Trump administration. Trump administration and by and large Republicans in Congress only want to listen to people who are cranks. And so I think it's being dishonest with my readers to to pretend otherwise. There's no way I can reach out to people who think that that reading Ayn Rand novels is is how you learn about monetary economics. Let me link it on that point. So if you

look at Ayn Rand, okay, so you said center right. What about extreme people who have like radical views? You think they're not grounded in In any kind of data in any kind of reality. I'm just the sort of Curious about how open we should be To ideas that seem radical. Oh Radical ideas is fine, but then you have to ask have to ask is there some basis for the radicalism. And if it's a, if it's something that is not grounded in anything, then, and particularly, by the way, if it's something that's been refuted by evidence again and again, and the people just keep saying if it's a zombie idea, and there's a lot of those out there, then there comes a point when it's not worth trying to fake

respect for it. I see. So there's a through the scientific process you've shown that this idea does not hold water, but I like the idea of zombie ideas, but they live on through, it's like the idea that the earth is flat, for example, has been for the most part of this proven. Yeah, but it lives on actually growing in popularity currently. Yeah, and there's a lot of that out there. And you can't, you can't wish it away and it's, you're not being fair to either yourself or if you're somebody who writes for the public, you're not being fair to your readers to pretend otherwise.

So quantum mechanics is a strange theory, but it's testable. And so while being strange, it's why they accepted amongst physicists. How robust and testable are economics theories? If we compare them to quantum mechanics and physics and so on. Okay, economics, look, it's a complex system. And it's also one in which by and large you don't get to do experiments.

And so economics is never gonna be like quantum mechanics. That said, you get natural experiments, you get tests of rival doctrines. You know, in the immediate aftermath of the financial crisis, there was one style, one one basic theory of macroeconomics, which ultimate goes back to John Maynard Keynes that made a few predictions. It said, under these circumstances, printing money will not be inflationary, running big budget deficits will not

cause a rise in interest rates, slashing government spending, austerity policies will lead to depressions if tried. Other people had exactly the opposite predictions. And we got a fairly robust test and one theory won. Interest rates stayed low, inflation stayed low, austerity countries that implemented harsh austerity policy suffered severe economic downturns. You don't get much, you know, that's pretty clear. And that's not going to be true on everything.

But there's a lot of empirical, I mean, the younger economists these days are very heavily data-based. And it's great. And I think that's the way to go. What theories of economics are, is there currently a lot of disagreement about what you said? Oh, first of all, there's just a lot less disagreement, really, among serious researchers in economics than people imagine. We actually, we can track that.

The Chicago Booth School has a panel, an ideologically diverse panel, and they pose, regularly pose questions. And on most things, there's a huge, there's remarkable consensus. There are a lot of things where there, people imagine that there's dispute, but the illusion of dispute is something that's basically being fed by political forces. And there isn't really. I mean there are, I think we, we, questions about what are effective ways to regulate technology industries. We really don't know the answers there. There's a, or, look, I don't follow every part. Minimum wages.

I think there is pretty overwhelming evidence that a modest increase in the minimum wage from current levels would not have any noticeable adverse effect on jobs. But if you ask how high can it go? $12 seems pretty safe given what we know. 15 is 15 okay. There's some legitimate disagreement there. I think probably, but I can people have a point. 20, where is the line at which it starts to become a problem? And the answer is truly we don't know. It's fascinating to try to, such a cool, economic school in that sense, because you're trying to predict something

that hasn't been done before, the impact, the effects of something that hasn't been done before. Yeah, you're trying, you're going out of sample. And we have good reason to believe that there are, you know, that it's non-linear, that there comes a point at which it doesn't work the way it has in the past. So as an economist, how do you see science and technological innovation? When I took

various economic courses in college, technological innovation seemed like a no-brainer way of growing an economy and we should invest in it aggressively. I may be biased, but it seems like the various ways to grow an economy seems like the easiest way, especially long-term. Is that correct? And it's so why aren't we doing it more? Well, the first question is, yeah, I mean, it's pretty much overwhelming. We think we can more or less measure this although there are some assumptions involved, but it's something like 70 to 80% of the growth and pre-capital income is basically the advance of knowledge. It's not just the crude accumulation

of capital, it is the fact that we get smarter. A lot of that, by the way, is more prosaic kinds of technology. I like to talk about things like containerization or an earlier period, the invention of the flat-pack cardboard box. That have had to be invented and now all of your deliveries from Amazon are made possible by the existence of that technology. The web stuff is important too, but what would we do without cardboard boxes? So, but all of that stuff is really important in driving economic progress. Well, why don't we invest more? Why don't we invest more in, again, more prosaic stuff? Why haven't we built another goddamn real tunnel under the Hudson River, for which the

need is so totally overwhelmingly obvious? How do you think about, first of all, I don't even know what the word prosaic means, but I inferred it, but how do you think about prosaic? Is it the really most basic dumb technology innovation? Or is it just like the lowest hanging fruit of where benefit can be gained? When I say prosaic, I mean stuff that is not sexy and fancy and high tech. It's building bridges and tunnels.

Having inventing the cardboard box were the, I don't know, where do we put I don't know, where do we put easy paths in there? That's a, it is actually using some modern technology and all that, but it's not gonna have, I don't think we're gonna make a movie about whoever it was that invented easy paths, but it's actually a pretty significant productivity booster. To me, it always seemed like something that everybody should be able to agree on

and just invest. So like in the same way, the investment in the military and the DOD is huge. So everyone kind of, not everyone, but there's an agreement amongst people that somehow that a large defense is important. It always seemed to me like that should be shifted towards if you want to grow prosperity of the nation, you should be investing in knowledge, yes, prosaic stuff, investing, investing infrastructure and so on. I mean, sorry to linger on it, but do you have any intuition? Do

you have a hope that that changes? Do you have intuition? Why is not changing? On core, which intuition? I have a theory. I'm reasonably certain that I understand why why we don't do it. And it's because we have a real values dispute about the welfare state, about how much the government should do to help the unfortunate. And politicians believe, probably rightly, that there's a kind of halo effect that surrounds any kind of government intervention. That even though providing people with enhanced social security benefits is really very different from building a tunnel under the Hudson River, politicians of both parties seem to believe that the government is seem to be successful at doing one kind of thing,

it will make people think more favorably on it doing other kinds of things. And so we have conservatives tend to be opposed to any kind of increase in government spending except military, no matter how obviously a good idea it is, because they fear that it's the thin end of the wedge for bigger government in general. And to some extent liberals tend to favor spending on these things partly because they see it as a way of proving that government can do things well and therefore it can turn to broader social goals. It's clearly there's a if you like the what you might have thought would be a technocratic discussion about government investment both in

research and in infrastructure is contaminated by the fact that government is government and people link it to other government actions. Perhaps silly question but as a species, we're currently working on venturing out into space, one day colonizing Mars. So when we start a society on Mars from scratch, what political and economic system should it operate under? Oh, I'm a big believer in. First of all, I don't think we're actually going to do that. But let's imagine hypothesize that we colonize Mars or something. Look, representative democracy is versus pure democracy. Well, yeah, pure democracy where people vote directly on everything is really problematic because people don't have time to try and master every issue. We could see what government by referendum looks like. There's

a lot of that in California and it doesn't work so good because it's hard to explain to people hard to explain to people with the various things they vote for may conflict. So, representative democracy is, it's got lots of problems. And I kind of the Winston Churchill thing, right? It's the worst system we know except for all the others. But so, yeah, sticking with the representative. And basically, the American system of regulation and markets and the economy we have going on is a pretty good one for Mars. If you start from scratch. If you start from scratch, you wouldn't want to send it.

We're 16% of the population has half the seats. You probably would want one which is more actually more representative than what we have. And the details, it's unclear. I mean, when times are good, all of the various representatives, democracy systems, whether it's parliamentary democracies or a US style system, whether you have a prime minister or the head of state as an elected president, they all kind of work well and they all, when times are good and they all have different modes of breakdown. So I'm not sure I know what the answer is, but something like that is given what we've seen through history.

It's the least bad system out there. I mean, I don't know if you, I'm a big fan of the TV series, The Expans, and it's kind of gratifying that out there, it's the Martian Congressional Republic. Okay. In a brief sense, so amongst many things, you're also an expert at international trade. What do you make of the complexity? So I can understand trade between two people, say two neighboring farmers. It seems pretty straightforward to me. But international when you start talking about nations and nation

trading seems to be very complicated. So from a high level, why is it so complicated? What are all the different factors that way that objectives need to be considered an international trade and maybe feeding that into a question of do you have concerns about the two giants right now of the U.S. and China and the intention that's going on with the international trade there with the trade war. Well first of all international trade is not really that different from trade among individuals. It's vastly more complex and there are many more players. But in the end, the reasons why countries trade are pretty much the same as the reasons why individuals trade.

Countries trade because they're different and they can derive mutual advantage from concentrating on the things they do relatively well. Also, there are economies of scale. You don't not, individuals have to decide whether to be a surgeon or an accountant, to probably not a good idea to try and be both, and countries benefit from specializing just because of the inherent advantages of specialization. And that's... So now the fact it's a big world and we're talking about millions of products being traded and in today's world often trade involves many stages so that made in China iPhone is actually assembled from components that are made all over the world and

But it doesn't really change the the fundamentals all that much There's a recurrent I mean the bake the big the Dirty little secret of international trade conflict is that actually it's not Conflicts among countries are really not that important. Most trade is beneficial to both sides to both countries, but it has big impacts on the distribution of income within countries. So the growth of US trade with China has made both US and China richer, but it's been pretty bad for people who were employed in the North Carolina furniture industry

who did find that their jobs were displaced by a wave of imports from China. And so that's where the complexity comes in. Not at all clear to me. I mean, we have some real problems with China, although they don't really involve trade so much as things like respect for intellectual property. Not clear that those real problems that we do have with China have anything to do with the current trade war. Current trade war seems to be driven instead by a fundamentally wrong notion that when we sell goods to China, that's good and when we buy goods from China, that's bad and that's misunderstanding the whole point. Is trade with China in both directions a good thing?

Yeah, we would be poorer if it wasn't for it, but there are downsides. As there are for any economic change, it's like any new technology makes us richer, but often hurts some people. Trade with China makes us richer, but hurts some people. And I wouldn't undo what has happened, but I wish we had had a better policy for supporting and compensating the losers from that growth. So, we live in a time of radicalization of political ideas, Twitter mobs and so on. And yet here you are in the midst of it, both tweeting and writing in New York Times articles, with strong opinions, writing this chaotic wave of public discourse. Do you ever hesitate or feel a tinge of fear

for exploring your ideas publicly and unapologetically? Oh, I feel fear all the time. It's not too hard to imagine scenarios in which I might personally find myself in the crosshairs. I am the king of hate mail. I get them. It's an amazing correspondence. Does it affect you?

It did when I started. These days, I've developed a very thick skin. So I know I don't usually get. In fact, if I don't get a wave of hate mail after a column, then I probably wasted the that that day So what do you make of that as a as a person who's putting ideas out there? If you look at the history of ideas The way it works is you write about ideas you put them out there

But now when there is so much hate mail so much division What advice do you have for yourself and for others, trying to have a discussion about ideas, difficult ideas? Well, I don't know what advice for others. I mean, if, you know, for most economists, you know, just do your research. That's a, we can't all be public intellectuals

and we shouldn't try to be. And in fact, I'm glad that I didn't get into this business until I was in my late 40s. It's probably best to spend your decades of greatest intellectual flexibility addressing deep questions, not confronting Twitter mobs. And as for the rest, when you're writing about stuff, the... That's sort of, you know, dance is like no one's watching, right? Like nobody's reading, right? What you then what you think is right, trying to make it obviously, trying to make it comprehensible and persuasive, but don't let yourself get intimidated by the fact that some people

are going to say nasty things. You can't do your job if you are worried about criticism. Well, I think I speak for a lot of people and saying that I hope that you keep dancing like nobody's watching on Twitter and New York Times and books. So Paul, it's been an honor. Thanks so much for talking to me. Great. Thanks for listening to this conversation with Paul Krugman.

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the most influential philosophers and economists in our history. It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest. We address ourselves not to their humanity, but to their self-love, and never talk to them of our necessities, but of their advantages. Thank you for listening, and hope to see you next time.