Archive for the 'Economics' Category

Wisdom from the Ivy League

Published
by
Steve Landsburg
on January 23, 2012
in Economics, Policy and Politics
. 106 Comments

Greg Mankiw’s four principles of tax reform are extraordinarily wise, and I think it’s fair to say that almost everyone who has thought hard about these issues will agree with everything he says.

I have only one quibble, and that’s that Greg is very sure we should eliminate the mortgage interest deduction in accordance with his first principle: “Broaden the Base and Lower Rates”. I think we should maybe keep it in accordance with his second principle: “Tax Consumption Rather than Income”. (Though I certainly agree that after the second principle has been implemented, it will be time for the mortgage interest deduction to go.)

How sad that so much wisdom is sure to go unheeded.

Click here to comment or read others’ comments.

In Which Paul Krugman Leaves Me At a Loss for Words

Published
by
Steve Landsburg
on January 20, 2012
in Bad Reasoning, Economics and Paul Krugman
. 60 Comments

Okay, this one’s almost too bizarre for words. First, Paul Krugman makes an argument that ignores the existence of corporate dividends. Then, pretty much everybody in the world points out his error. Then, he admits his error, but, true to form, takes an irrelevant swipe at his critics. But in this case, the irrelevant swipe is: “Aha! You’ve just admitted that corporations pay dividends! So much for your past claims that corporations pay wages!”

Umm…Paul? They pay both. I’d lift Krugman’s own favorite dismissive phrase and say “That’s Economics 101″, but actually it’s probably standard knowledge among middle schoolers.

To review the details:

First, Krugman reposted (from the website of a left-wing advocacy group) a highly misleading chart purporting to illustrate the federal tax burdens borne by various income groups. The chart accounts for payroll and income taxes, but omits corporate taxes, thereby making the burden on high-income tax payers appear substantially smaller than it is, because corporate taxes reduce dividends which are disporportionately paid to high-income taxpayers.

Next, he got called on it by lots and lots of people, including, for example, Greg Mankiw.

Next, Krugman acknowledged his error. But, as always, he did so with the least possible grace, suggesting that his critics, by virtue of pointing out Krugman’s mistake, have somehow undermined their own principles.

In particular, his position is that by acknowledging that corporate profits benefit shareholders, “conservatives” have undermined their own ability to claim that corporations benefit anyone other than shareholders (e.g. workers). He relies, in other words, on the cockamamie notion that if something is good for group A, it can’t possibly also be good for group B.

Continue reading ‘In Which Paul Krugman Leaves Me At a Loss for Words’

Mitt Romney’s Taxes

Published
by
Steve Landsburg
on January 18, 2012
in Bad Reasoning, Current Events and Economics
. 107 Comments

Mitt Romney says his tax rate is “probably around 15%”. It’s not clear what he means by that (marginal rate? average rate? federal rate? federal-plus-state-plus-local rate?) but the New York Times is quick to point out that he’s a beneficiary of the “fact” that investment income is taxed at a much lower rate than wages and salaries, leaving him with a lower percentage tax burden than the working-stiffs he employs.

For at least the eighth time on this blog, I want to point out that this widely believed “fact” is not true.

To understand Mitt Romney’s tax burden, you have to compare him to his doppelganger Timm Romney, who lives on a planet with no taxes. In the year (say) 2000, Mitt and Timm both earned (say) a million dollars. Timm invested his million dollars, saw it double over the past decade or so, and cashed out his investment this year, leaving him with two million dollars. Mitt, by contrast, paid 35% tax in 2000, leaving him with $650,000. He invested it, saw it double, and cashed out last year, paying 15% tax on the $650,000 capital gain. That leaves him $1,202,500, which is about 60% of what Timm’s got. In other words, the tax system costs Mitt almost 40% of his income.

By contrast, people on our planet without investment income collect their wages, pay 35% in taxes, and spend what’s left. The tax system costs them 35%, while it costs Mitt almost 40%. In other words, people with investment income bear a higher tax burden, as a percentage of their income, than anyone else — and that’s before you even start accounting for the taxes on dividends, interest, corporate income and inheritance.

Continue reading ‘Mitt Romney’s Taxes’

How to Fix Everything

Published
by
Steve Landsburg
on January 10, 2012
in Economics, Empirical Puzzles and Policy
. 10 Comments

Here is how I answered that question in Jamaica:

Get the Flash Player to see this content.

(Slightly higher quality video here.)

Edited to add: There were apparently some problems with the video stalling somewhere around the one-hour mark (during the post-talk question period.) I believe this is fixed now.

Click here to comment or read others’ comments.

Debt: The Never-Ending Topic

Published
by
Steve Landsburg
on January 6, 2012
in Economics
. 83 Comments

Don Boudreaux, who as always merits careful attention, attempts to mediate among me, Paul Krugman, Bob Murphy and Nick Rowe on the subject of the public debt. His title is “Let’s not Talk Past Each Other on the Burden-of-Public-Debt Issue”. Indeed, I think that to a very large extent we are all saying exactly the same thing (as you’d expect, because we’re all good at thinking about this kind of stuff, and really, it’s not that hard), but disagreeing about where the emphasis should lie. So let me sum up the major points here. (For background see here, here, here, and the links therefrom.) I think it would be great if Bob, Nick, Don and Paul would let us know, by number, which of these points (if any) they disagree with:

Continue reading ‘Debt: The Never-Ending Topic’

Debt Again

Published
by
Steve Landsburg
on January 5, 2012
in Economics
. 51 Comments

I hadn’t intended this to be national debt week here at The Big Questions, but when you get into a back-and-forth with a guy as compulsively readable as Bob Murphy, you milk it for all it’s worth.

Murphy objects to formulations along the lines of “government debt is not a burden because we owe it to ourselves” and offers a parable that he thinks illustrates all the key issues. I agree that his parable illustrates all the key issues, so let’s review it — and see what it really illustrates.

Continue reading ‘Debt Again’

You, Your Grandchildren, and the Public Debt

Published
by
Steve Landsburg
on January 4, 2012
in Economics and Paul Krugman
. 64 Comments

Nick Rowe, applauded by such luminaries as Don Boudreaux and Bob Murphy, argues that, contrary to folks like Paul Krugman and yours truly, government debt is too a burden on our grandchildren, unless you believe in Ricardian Equivalence.

I want to explain what that means, and why it’s wrong.

To make sure we’re all talking about the same thing, I’m going to adopt all of Nick’s assumptions, most critically that all taxes are lump sum. I’ll come back at the end and say a little more about why this obviously false assumption is the right assumption to make.

Now: Suppose the government borrows money to finance a tax cut. That makes us feel richer. We therefore buy and consume more stuff, which leaves less stuff for our grandchildren to consume. (Nick tells a very nice detailed story about how this might play out across generations; I applaud that kind of detail, but it’s not important for this response.) Government debt is therefore a burden to our grandchildren.

Unless! If we — the current generation — foresee all this, and care about our grandchildren, we’ll choose to (in effect) undo what the government has done by saving our tax cuts and giving them as gifts to our grandchildren (presumably as part of their inheritance). This restores every generation’s consumption to the original status quo.

Ricardian Equivalence is the economist’s jargon for the assertion that we will foresee all of this, and will care about our grandchildren, and therefore will give them our tax cuts as gifts. Nick Rowe’s claim is that unless you make the very strong assumption that Ricardian equivalence holds, government debt enriches us at the expense of our grandchildren.

Here’s why that’s wrong: Continue reading ‘You, Your Grandchildren, and the Public Debt’

Actually, We Owe It All to Ourselves

Published
by
Steve Landsburg
on January 3, 2012
in Economics and Paul Krugman
. 57 Comments

Paul Krugman has a very good column on government debt and why it doesn’t matter nearly as much as many people believe. There’s just one spot in the column where I think Krugman misses the point, and therefore makes a weaker case than he could have made. He writes:

U.S. debt is, to a large extent, money we owe to ourselves.

…

It’s true that foreigners now hold large claims on the United States, including a fair amount of government debt. But every dollar’s worth of foreign claims on America is matched by 89 cents’ worth of U.S. claims on foreigners. And because foreigners tend to put their U.S. investments into safe, low-yield assets, America actually earns more from its assets abroad than it pays to foreign investors. If your image is of a nation that’s already deep in hock to the Chinese, you’ve been misinformed. Nor are we heading rapidly in that direction.

All true, but all beside the point. Even if 100% of U.S. debt were held by foreigners, and even if Americans had no offsetting claims on foreigners whatsoever, the U.S. debt would still be money we owe to ourselves.

Continue reading ‘Actually, We Owe It All to Ourselves’

Merry Christmas

Published
by
Steve Landsburg
on December 25, 2011
in Economics
. 7 Comments

Merry Christmas. For those of you who are actually surfing the net today, you might enjoy Art Carden’s Forbes piece on how economists ruined Christmas.

Happy Holidays

Published
by
Steve Landsburg
on December 23, 2011
in Blogging, Economics and Literature
. 19 Comments

I’ll probably blog very little over the next ten days or so, in recognition of the fact that most of you won’t be reading. (On the other hand, if, say, the New York Times publishes something sufficiently egregious, I might not be able to restrain myself. Meanwhile, for your holiday pleasure, here’s the Christmas column I published in Slate in 2004:

What I Like About Scrooge

scroogeHere’s what I like about Ebenezer Scrooge: His meager lodgings were dark because darkness is cheap, and barely heated because coal is not free. His dinner was gruel, which he prepared himself. Scrooge paid no man to wait on him.

Scrooge has been called ungenerous. I say that’s a bum rap. What could be more generous than keeping your lamps unlit and your plate unfilled, leaving more fuel for others to burn and more food for others to eat? Who is a more benevolent neighbor than the man who employs no servants, freeing them to wait on someone else?

Oh, it might be slightly more complicated than that. Maybe when Scrooge demands less coal for his fire, less coal ends up being mined. But that’s fine, too. Instead of digging coal for Scrooge, some would-be miner is now free to perform some other service for himself or someone else.

Dickens tells us that the Lord Mayor, in the stronghold of the mighty Mansion House, gave orders to his 50 cooks and butlers to keep Christmas as a Lord Mayor’s household should—presumably for a houseful of guests who lavishly praised his generosity. The bricks, mortar, and labor that built the Mansion House might otherwise have built housing for hundreds; Scrooge, by living in three sparse rooms, deprived no man of a home. By employing no cooks or butlers, he ensured that cooks and butlers were available to some other household where guests reveled in ignorance of their debt to Ebenezer Scrooge.

Continue reading ‘Happy Holidays’

Launching the Innovation Renaissance

Published
by
Steve Landsburg
on December 20, 2011
in Books, Economics, Policy and Recommendations
. 8 Comments

tabarroIn late 17th century England, there were no newspapers outside of London, and scarcely a printer outside of London, Cambridge and Oxford. The difficulty and expense of conveying large packets from place to place was so great that an extensive work took longer to reach Devonshire or Lancashire than it took, in Victorian times, to reach Kentucky. As a result, books and printed matter generally were largely unavailable outside of London — and London, for most rural Englishmen, might as well have been the moon.

I learned this from Macaulay’s History of England, which I just pulled up on my Kindle, which of course gives me instant — and searchable! — access to pretty much everything that’s ever been published. But the Kindle, and its brother e-readers, are more revolutionary than that. Not only do they give us easy access to existing literature; they call forth entirely new literary genres, such as the Kindle e-book, which brings to market extended essays that are too long to be magazine articles but too short to be traditional books — and are priced to sell.

All of which brings me to Alex Tabarrok’s Launching the Innovation Renaissance: A New Path to Bring Smart Ideas to Market Fast, which is both a product and a celebration of the innovation revolution, along with a recipe, or rather a set of recipes, for nurturing that revolution.

This is a great book. It’s fast-paced, fun to read, informative as hell, and it gets everything right. At first I wished I’d written it— until I realized I could never have written it half so well.

Continue reading ‘Launching the Innovation Renaissance’

The Price of a Haircut

Published
by
Steve Landsburg
on December 8, 2011
in Current Events and Economics
. 31 Comments

Yesterday I had the pleasure of attending a very good talk by Yale’s Gary Gorton on the origins of the financial crisis.

Gorton’s story is that this was a bank run, not substantially different from the bank runs that have always plagued capitalist economies. In this case, the run took place in the repo market, which is an unregulated (and largely unmonitored) industry roughly equal in size to the standard banking industry. The repo market serves large institutions (e.g. Fidelity Investments or state governments) with a lot of cash on hand that they want to stash in an interest-bearing account for a day or two. So Fidelity deposits, say, a half-billion dollars at, say, Bear Stearns, just as you might deposit five hundred dollars at your local bank. One difference, though, is that your account at your local bank is insured, whereas Fidelity’s account at Bear Stearns is not — so Fidelity, unlike you, demands collateral for its deposit. Bear Stearns complies by handing over a half-billion dollars worth of bonds, of which Fidelity takes physical possession. The next morning, Fidelity withdraws its money and returns the bonds.

The problem comes in when rumors begin to spread that some bonds might be riskier than they appear, and Fidelity starts to worry that maybe Bear Stearns is picking particularly risky bonds to hand over. Therefore Fidelity demands more than a half-billion in bonds to guarantee its half-billion dollar deposit. If there’s, say, a 10% discrepancy between the deposit and the collateral, we say that Bear Stearns has taken a half-billion dollar haircut.

Because Bear Stearns has a fixed quantity of bonds on hand, and because all of its depositors are demanding haircuts, Bear Stearns can now accept fewer deposits than before. This means that Bear Stearns has less cash on hand. This makes depositors even more worried about the security of their deposits, which means they demand larger haircuts. The effects snowball until Bear Stearns collapses. Like so:

Continue reading ‘The Price of a Haircut’

Surprises

Published
by
Steve Landsburg
on December 2, 2011
in Economics and Video
. 3 Comments

Travel and other projects have kept me absent for a couple of weeks, but I’m hoping to be back on a regular blogging schedule very soon now. Meanwhile, here is the video of the Gosnell Lecture that I recently gave at the Rochester Institute of Technology, titled “More Sex is Safer Sex and Other Surprises”.

One of the surprises turned out to be that the audiovisual equipment didn’t work, so I didn’t get to show my prepared slides. But I think things went pretty well anyway.

Slightly higher quality video is here.

Get the Flash Player to see this content.

Click here to comment or read others’ comments.

Happy Birthday, Baby Seven Billion

Published
by
Steve Landsburg
on October 31, 2011
in Birthdays, Economics and Progress
. 36 Comments

baby7Happy birthday to our 7 billionth fellow earthling, who, according to most estimates, is due to be born today.

Welcome to the earth. Congratulations on being born in the 21st century, where the odds are excellent that you’ll live a richer, more prosperous and more fulfilling life than almost any of the 100 billion or so who preceded you — and paved the way for your prosperity with their investments and their inventions. Would that there had been more of them.

As you go through life, you will almost assuredly contribute to the world’s stock of ideas, diversity and love in ways your parents never contemplated — which is why the rest of us are a little sad that you might be their last child.

There’s certainly such a thing as a population that’s too large. Nobody disputes that. The interesting question is: Given the incentives faced by parents, it the population size we actually get too large or too small? And there are good reasons to think it’s too small.

In fact, population growth is a lot like pollution in reverse. Polluters don’t care about the damage they impose on strangers, so they pollute too much. Parents and potential parents don’t care about they joy and prosperity their chidren bring to strangers, so they reproduce too little.

Continue reading ‘Happy Birthday, Baby Seven Billion’

How the Death Tax Hurts the Poor

Published
by
Steve Landsburg
on October 29, 2011
in Economics, Policy and Self-Promotion
. 25 Comments

Here is my piece on the death tax in this morning’s Wall Street Journal (subscription probably required); viewers of this video will find the arguments eerily familiar.

Here’s the one passage the WSJ didn’t have room for; one day our children will look back in wonder on an age when the length of an argument was constrained by anything so archaic it could be measured in square inches:

I know you’ve heard it said that spending is good for the economy. That might be true during a recession, if you subscribe to a broadly Keynesian view of the world. But the death tax encourages overspending year in and year out, which is not a good thing no matter what your point of view.

Click here to comment or read others’ comments.

Death And Taxes

Published
by
Steve Landsburg
on October 21, 2011
in Current Events, Economics, Policy, Politics and Self-Promotion
. 37 Comments

Herewith my remarks about the estate tax (with particular reference to its effects on the very rich, and why we should care) to Congressional staffers, presented a couple of days ago under the auspices of the American Family Business Institute. Here is higher quality video. Here is the even higher quality YouTube version. Here is video of the entire event. I particularly recommend the first talk, by Stephen Entin.

Note that all of my remarks apply equally well to all forms of capital taxation. Entin did a better job of focusing on the particular shortcomings of the estate tax.

Get the Flash Player to see this content.

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IS-LMic Extremism (With a Postscript on the Nobel Prize)

Published
by
Steve Landsburg
on October 10, 2011
in Economics
. 37 Comments

The IS-LM model is the simplest version of the “old Keynesian” approach to macroeconomics. You don’t hear much about IS-LM in the research literature these days, but it’s been coming up a lot on the blogs. Tyler Cowen tells us what he doesn’t like about the model; Brad DeLong and Paul Krugman rise to its defense; Stephen Williamson takes up the gauntlet, and Scott Sumner weighs in.

None of them, in my opinion, has touched the main issue, which is that IS-LM provides absolutely no framework for policy analysis because it makes no assumptions, and draws no conclusions, about what people are trying to accomplish. If you don’t know what people are trying to do, you can’t possibly know how best to help them.

Suppose, for example, that, as Paul Krugman believes, the current state of the economy is being driven by a “liquidity trap”, which means that people are hoarding money instead of spending it, and therefore consuming less, which is why employment is so low. Two weeks ago on this blog, I posed the following question to the IS-LMers:

Why aren’t you thrilled with the current state of the economy? … Why, as the stock of money continues to grow, shouldn’t the joy of hoarding eventually compensate for the annoyance of not having food on the table?

The IS-LM model provides no answer to that question. A model that can’t decide whether the current US economy is in a state of Nirvana is not a useful model for policy evaluation.

Continue reading ‘IS-LMic Extremism (With a Postscript on the Nobel Prize)’

There He Goes Again

Published
by
Steve Landsburg
on October 3, 2011
in Bad Reasoning, Economics, Paul Krugman, Policy and Politics
. 84 Comments

Paul Krugman’s latest venture into self-parody starts with a recent paper on the cost of air pollution, which finds that said costs are big and heavily concentrated in a few industries. Krugman then links to a New York Times article surveying Rick Perry’s past clashes with the EPA. With no further argument, he concludes that

Today’s American right doesn’t believe in externalities, or correcting market failures; it believes that there are no market failures, that capitalism unregulated is always right. Faced with evidence that market prices are in fact wrong, they simply attack the science.

Where to begin?

Continue reading ‘There He Goes Again’

D’oh!

Published
by
Steve Landsburg
on September 28, 2011
in Economics
. 39 Comments

Well, it took embarrassingly long for me to see this but there’s really a very simple resolution to the quandary I posted Monday. The key point is this:

In a flexible price world, anybody can supply money at a social cost of zero. In a fixed price world, only the government can.

To be more precise: I currently hold $11. Suppose I agree to hold a twelfth. In a flexible-price world, I can get this dollar from the government (which prints it up at zero cost) or I can get it from my friend Jeeter, whereupon the price level adjusts and the rest of the world’s real balances (including Jeter’s) are restored to their original level. No social cost either way. In a fixed-price world, I can get this dollar from the government (which prints it up at zero cost) or I can get it from my friend Jeeter, whereupon prices don’t move and the rest of the world’s real balances are reduced. Zero social cost one way, positive social cost the other way.

Continue reading ‘D’oh!’

A Keynesian Quandary

Published
by
Steve Landsburg
on September 27, 2011
in Economics
. 64 Comments

Last week I blogged about my perplexity regarding the Keynesian notion of a liquidity trap.

In thinking about this harder, I’ve come to realize that a good part of my confusion has nothing to do with liquidity traps. It comes down to a very specific question about sticky-price models in general.

I expect this discussion will be interesting only to the most wonkish of my readers. The non-wonkish are invited to ask for clarifications, but please don’t jump in claiming to have “definitive” answers unless you’ve got a good grasp of the basics. I’d like to keep this discussion on track, and I’d like to learn something from it. Uninformed noise will be counterproductive.

For what it’s worth, I’ve discussed this offline, at considerable length, with several very good macroeconomists who eventually pronounced themselves as confused as I am. I really am hoping somebody with the right insight will pop up here and set us all straight.

Continue reading ‘A Keynesian Quandary’

Are These The Good Old Days?

Published
by
Steve Landsburg
on September 23, 2011
in Economics
. 102 Comments

I am not well versed in Keynesian business cycle theory. Therefore I have a very naive question for the Keynesian economists:

Why aren’t you thrilled with the current state of the economy?

Here’s why I ask: According to what I take to be an orthodox Keynesian view, we are now in a liquidity trap. (My question does not apply to Keynesians, new or old, who believe otherwise.) That means that people want to hold lots and lots of money instead of spending it. Cool! We can provide money at almost zero cost. So it should be easy to make people very happy. What’s the problem?

Of course, people are working less, but that makes perfectly good sense in a world where people prefer to consume less. Why spend all day on an assembly line churning out widgets that people prefer not to buy?

A quick and obvious answer is that the people who are choosing to accumulate money and the people who are out of work are not the same people. In other words, to put this in slightly more technical language, you can’t address this question in a so-called “representative agent model” — a model that abstracts from interpersonal differences.

Still: The theory, as I understand it, is that vast numbers of people are choosing to hold vast amounts of money. Since money can be produced costlessly, this ought to count as a very good thing — which should offset a lot of very bad things, no?

Whatever answer there is might vary from one Keynesian economist to another, so let me subdivide my question into two:

  1. Why aren’t “old Keynesians” perfectly happy with the current state of the economy?
  2. Why aren’t “new Keynesians” perfectly happy with the current state of the economy?

Continue reading ‘Are These The Good Old Days?’

Survival of the Fittest

Published
by
Steve Landsburg
on September 21, 2011
in Current Events and Economics
. 37 Comments

The Wall Street Journal reports that `daily deal’ sites like Groupon are dying fast, casualties of the expensive competition for new users. Groupon now spends about $8 to lure one active user.

This looks like a good example of Darwinian competition yielding an inefficient outcome — as we should expect. (See Chapter 8 of my book The Armchair Economist for more on why Darwinian competition is nothing like market competition, and far more likely to yield bad outcomes.) Vast sums are being spent in an arms race with relatively little social value. Surely consumers benefit from all this competition, but it’s highly implausible that they benefit enough to justify such high expenditures. Even after the recent Great Winnowing, about 350 of these sites remain; surely consumers (none of whom have the time to visit 350 sites a day) would be almost equally well served by 50 sites, at about 1/7 the cost.

Continue reading ‘Survival of the Fittest’

Compassion Play

Published
by
Steve Landsburg
on September 19, 2011
in Current Events, Economics, Morality, Outrage, Paul Krugman and Policy
. 83 Comments

One thing I like about the study of economics is that it fosters compassion. When part of your job is to predict human behavior, you quickly learn the value of understanding other people’s problems. When the other part of your job is ferreting out the unseen global consequences of our choices, you’ve taken the first step toward caring about those consequences.

For example: Suppose a guy with no health insurance and no assets shows up at a hospital emergency room with an urgent life-threatening condition. Should you let him die? Ordinary compassion says no. The heightened compassion of the economist says, at the very least, maybe.

First, a policy of providing emergency health care to everyone is pretty much the same thing as a policy of providing emergency health insurance to everyone. It was specified here that this was a guy who didn’t want health insurance. So let’s recognize for starters that such a policy runs counter to — I am tempted to say runs roughshod over — the guy’s own revealed preference. It’s an odd sort of compassion that forces people to buy things they don’t want.

Now you might object that nobody’s forcing this guy to buy emergency health care; we’re trying to give him emergency health care. Not so fast. Here’s the first place where a little economic training goes to hone one’s sense of compassion: The emergency health insurance we’re foisting on this guy has a cost. We can spend that money on emergency rooms or we can spend it on a myriad of other things the guy might prefer. How is it compassionate to give him one thing when he prefers another?

This is particularly true if the guy happens to be very poor. Poor people have a lot of problems, and emergency health care is only one of them. They need better education, they need better transportation, and they need a little help buying groceries.

There is room for lots of debate and lots of disagreement about how much we as a society should be spending to help poor people. That’s not the issue here. The issue here is: Given that you’ve decided to spend an extra such-and-such many dollars a year helping poor people, why would you spend it in this particular way rather than one of the many other ways they could use it? For God’s sake, why not at least ask them if they’d rather have the cash?

Continue reading ‘Compassion Play’

Cats, Dogs and Quantum Mechanics

Published
by
Steve Landsburg
on September 13, 2011
in Economics, Game Theory, Math and Physics
. 83 Comments

The game of Cats and Dogs works like this: You and your teammate are placed in separate rooms and forbidden to communicate. You are each asked a randomly chosen question: Either “Do you like cats?” or “Do you like dogs?” (Each of your questions is determined by a separate fair coin flip.)

You win if your answers agree — unless you were both asked the “cats” question, in which case you win if your answers disagree.

A little reflection should convince you that if you are allowed to meet with your partner and plot strategy before the game, then the best you can do is agree to always agree — say by both always answering “yes”. That way, you win 75% of the time, and there’s no way to do better. In particular, there’s nothing to be gained by randomizing your answers.

That, at least, is true, in a world governed by the laws of classical physics and probability theory. But in a world governed by the laws of quantum mechanics — which is to say, in the world we live in — you can in principle do better. Namely: You each carry with you one of a pair of entangled “quantum coins” (actually elementary particles, but I prefer to think of them as coins, since you’re going to use them as randomizing devices).

Continue reading ‘Cats, Dogs and Quantum Mechanics’

Thursday Puzzle and More

Published
by
Steve Landsburg
on September 8, 2011
in Current Events, Economics, Politics and Puzzles
. 10 Comments

Yesterday’s post on taxation generated a whole lot of comments that deserve responses; unfortunately I’m too swamped right now to respond. Worse yet, I’ll be out of town — and probably not blogging — for the next few days. Sometime next week, I’ll try to craft a new blogpost addressing much of what was said in those comments.

Meanwhile, here, courtesy of our frequent and invariably interesting commenter Mike H, is a puzzle to keep you busy while I’m gone:

Continue reading ‘Thursday Puzzle and More’

The Romney Plan

Published
by
Steve Landsburg
on September 7, 2011
in Current Events, Economics and Politics
. 44 Comments

I have not read or even skimmed Mitt Romney’s 160-page economic plan; all I know is what I’ve seen in the headlines. So all of this is subject to revision. But:

Continue reading ‘The Romney Plan’

Recap

Published
by
Steve Landsburg
on September 2, 2011
in Bad Reasoning, Economics, Paul Krugman and Policy
. 31 Comments

Some commenters still seem confused about the locus of disagreement in this week’s back-and-forth with Paul Krugman. I post today not to beat a dead horse, but to clarify the issues for those who are interested in understanding them. Please keep any discussion both civil and on-topic. I’ve numbered the points below for easy reference.

Continue reading ‘Recap’

Panglossian Economics

Published
by
Steve Landsburg
on August 31, 2011
in Bad Reasoning, Current Events, Economics and Paul Krugman
. 102 Comments

PanglossIn a radical departure from his previous expressions of dissillusionment, Paul Krugman has implicitly declared in his latest blog post that we are now living under the best of all policy regimes. I presume he will now be able to retire with satisfaction from his career as a gadfly.

The context is Eric Cantor’s demand that any federal disaster relief in the wake of Irene be offset by spending cuts elsewhere. Krugman thinks this is silly, and proves his point with an appeal to the standard Ricardian theory of public finance. According to that theory, which all economists understand and accept, if you’ve got to bear a cost, it’s best to spread that cost out over as many activities as possible. So ideally, you’d pay for disaster relief partly through spending cuts, partly through (current) tax increases, and partly through an increase in the deficit. Therefore says Krugman, “the bottom line is that basic, regular economics says that Cantor isn’t making sense.”

Since Krugman has carelessly neglected to spell out an important detail of his argument, let me fill in the gap for him: The Ricardian conclusion does not come from thin air; instead it follows logically from certain premises, key among which is that you’re starting from an ideal policy regime.

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Economics 102

Published
by
Steve Landsburg
on August 22, 2011
in Economics and Paul Krugman
. 13 Comments

One of Paul Krugman’s favorite tactics is to assert that all he’s doing is channeling the time-honored lessons of Economics 101 — pre-empting dissent with the implication that any dissenter must be either an ignoramus or a radical. (Journalistic honesty compels me to acknowledge that I might have employed this rhetorical tactic once or twice myself over the years.)

It’s interesting, then, to take note of how very far his central arguments actually deviate from Economics 101. Here’s what he said last week on his blog:

Mulligan and others keep emphasizing examples of individual groups that have managed to gain jobs by cutting wages or offering other attractions to would-be employers. They then assert that these examples tell us what would be needed to expand overall employment.

The point, of course, is that all such arguments amount to committing the fallacy of composition…The essence of macroeconomics is understanding why such things are a fallacy, why what happens if one group does something is not at all what happens when everyone does it.

But you see, here’s the thing: According to the standard Economics 101 version of the sticky-wage Keynesian model, this is a case where what happens if one group does something is exactly the same as what happens when everyone does it. According to that model, as long as wages continue to fall, firms will continue to move along their labor demand curves until we reach full employment.

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The High Price Of Wi-Fi

Published
by
Steve Landsburg
on June 6, 2011
in Economics and Empirical Puzzles
. 13 Comments

routerOne of my weaker columns when I wrote for Slate was a highly unsatisfactory stab at why some hotels charge for wireless and others don’t. Today my wife, who had never seen that column, asked me the same question, and I think my off-the-cuff answer was probably better than anything I said in Slate.

So here’s my new stab at this:

Continue reading ‘The High Price Of Wi-Fi’

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