Tag: Paul Krugman

When they Give You “Anti-Lemons”…

On Tuesday, I criticized a new economic modeling paper (“Anti-Lemons”) purporting to show that unfettered education markets are bad and that government can fix them with the right regulations.

Andrew Gillen comes to the study’s defense, and I’m delighted that he’s taken the trouble to reflect on it rather than just saying “I like it.” But there are problems with his analysis. First, he faults me for dismissing the “Anti-Lemons” models for being based on false assumptions, citing Paul Krugman:

I am a strong believer in the importance of models, which are to our minds what spear-throwers were to stone age arms: they greatly extend the power and range of our insight. In particular, I have no sympathy for those people who criticize the unrealistic simplifications of model-builders.

Even if we put aside the fact that Paul Krugman is at times less reliable than the Daily Show website, there is an important difference between assumptions that are “unrealistically simplified” and those that are patently wrong. With the former, your model might still huck its intellectual spear somewhere in the general vicinity of the truth, with the latter, you’re just going to put your eye out.

“Anti-Lemons” is in the put-your-eye-out camp. Among other things, it assumes the productivity of all schools is equal. This is both totally false and highly germane – efficiency varies dramatically among schools, and private schools as a whole are consistently more efficient than government schools (as we will see below). Failing to recognize that reality will lead to incorrect results from the model, and this is just one of the false assumptions the paper adopts (see my previous post for others).

Second, Gillen writes that

going by Coulson’s numbers in figure 2 here, we would expect to find a positive impact of markets over government on achievement in slightly less than 2 out of 3 studies (with insignificant findings making up the majority of the others). If the case for free markets over government schools is really so clear cut (and I lean strongly in this direction), than why isn’t this 3 out of 3?

There are many plausible reasons for this result (lack of statistical power, omitted variable bias, other misspecification errors, etc.), but one is particularly worth raising here: government schools in many parts of the world spend several times as much per pupil as their private sector counterparts. This is true in most developing countries, from which a great deal of the inter-sectoral research hails. And when I looked at statewide data from Arizona in 2006 I found that government schools spend roughly 50 percent more than private schools. While it’s true that government school outcomes tend not to improve much as spending rises, the same cannot be said of private schools.

If this is true, you might ask, then wouldn’t the inter-sectoral research on school efficiency be more stark than the research on achievement (that fails to take spending levels into account)? The answer is yes. In fact, if you examine the efficiency bar in the same figure 2 cited by Gillen above, you will see that every single one of the efficiency comparisons between market and monopoly schools is significant and favors the market schools.

So, not only is the “Anti-Lemons” model useless, it is worse than useless: it seems to mislead even intelligent readers into believing that there is some mystery in the literature that needs to be solved by blindly waiving a spear around.

“Anti-Lemons” is neither Camelot, as I said yesterday, nor is it Sparta as Andrew implied. It’s the kid from Christmas Story who nearly puts his eye out by the cavalier application of a potentially powerful tool.

Krugman: The Hubris of Central Planning

In the New York Times today, Paul Krugman discusses the Euro and the problem of Greece. He hastens to note that the problem is not debts, deficits, and government profligacy, which it sure might seem like to the untrained eye. But he fingers a different and deeper problem:

No, the real story behind the euromess lies not in the profligacy of politicians but in the arrogance of elites — specifically, the policy elites who pushed Europe into adopting a single currency well before the continent was ready for such an experiment….

It’s an ugly picture. But it’s important to understand the nature of Europe’s fatal flaw. Yes, some governments were irresponsible; but the fundamental problem was hubris, the arrogant belief that Europe could make a single currency work despite strong reasons to believe that it wasn’t ready.

Now, you’ll note that Krugman says that Europe wasn’t yet “ready” for a single currency, suggesting that in some happy day it will be. Because of course the logic of history is always to move toward centralization and conformity, right? Nevertheless, it’s great to see Paul Krugman criticizing the arrogance of elites and the hubris of the centralizing impulse.

Do Democratic Presidents Create More Jobs?

Politifact.com looked into a remark from Rep. Carolyn Maloney, D-N.Y., that “Democrats have been considerably more effective at creating private-sector jobs.”

The statement was rated true, as a purely statistical matter.  Yet the poltifact researcher did a good job questioning the significance of his own figures.  He noted, correctly, that the president usually “deserves less credit for the good times – and less blame for the bad times.”  And he added that job figures can be driven by outside factors such as oil price shocks, demographic changes or soldiers coming home after World War Two.  He wryly noted “how surprised we are that Eisenhower, who presided over the ‘happy’ 1950s, managed an anemic half-percent job growth per year, while Jimmy “Malaise” Carter finished second with 3.45 percent annual job growth.”   Anyone who remembers the runaway inflation of the Carter era will realize that annual rates of job growth are not enough to describe the overall economic situation.

The author also quoted me making the point that “timing can be hugely important.”   It is so important, in fact, that we may need to add another dimension to politifact’s true-false meter to deal with political comments that are simply meaningless.

For the record, what follows is the full text of my email on this topic:

The error involved with assigning rates of job growth to Presidential terms is that six recent Presidents took office within a few months of the start of a recession: Obama (recession began December 2007), H.W. Bush (July 1990), G.W. Bush (Mar 2001), Reagan (July 1981), Nixon (Dec. 1969) and Ike (July 1953).   As it happens, four of the five were Republicans.

One might argue that recessions launched near the end of the previous administration helped get these men elected. But these recessions were clearly left over from events that began previous years.  It didn’t help that the first Pres. Bush passed a tax increase three months after the 1990 recession began, but the start of that recession is more plausibly blamed on the earlier spike in oil prices when Iraq invaded Kuwait.

Since employment is a lagging indicator (one of the last things to improve), that means average job growth among Presidents who took office near the start of recessions is bound to look bad in comparison with Presidents who took office after an expansion was well underway.  Bill Clinton took office in 1993, long after recession ended in March 1991.   The same was true of Truman, LBJ and Carter.   JFK took office a month before the 1960 recession ended.

Two-term Presidents also have more time to show good numbers, but only if they’re lucky enough to get out of office just before the next recession starts.  Clinton squeaked by (despite falling stock prices and industrial production 2000), but Nixon, Eisenhower, Carter and G.W. Bush did not.

Since Bush 2nd began and ended office in recession, averages over 8 years outweigh 4 reasonably good years.  This unprecedented bad timing is exaggerated by Paul Krugman’s comparison of “decades” [and President Obama’s recent reference to “the lost decade” of 1999-2009] which relies on starting and ending each decade in boomy 1959 rather than slumping 1960, ditto 1969 rather than 1970, 1979 rather than 1980, 1989 rather than 1990, and 1999 rather than 2000.

In short, statistics about employment growth over Presidential terms are dominated by the timing of the “business cycle” (including Federal Reserve policy), and have no apparent connection to economic policies attributed to the White House (as opposed to Congress).

Vikings and Pirates and Taxes, Oh My!

Today’s episode of “Hagar the Horrible” could be an epigraph for the new Fall 2009 issue of Cato Journal.

Hagar_The_HorribleThis issue includes Greek economists Michael Mitsopoulos and Theodore Pelagidis on “Vikings in Greece: Kleptocratic Interest Groups in a Closed, Rent-Seeking Economy” as well as Peter Leeson, author of The Invisible Hook: The Hidden Economics of Pirates, writing (with David Skarbek) on the effects of foreign aid. As for taxes, well, editor Jim Dorn has assembled a number of useful papers:

  • Andrew T. Young on taxing, spending, and “fiscal illusion”
  • Michael J. New on the “starve the beast” hypothesis
  • Alan Reynolds on Paul Krugman’s misunderstanding of the monetary and fiscal lessons of the Great Depression and Japan’s lost decade

And on the general rapaciousness of the state, don’t miss Jason Kuznicki’s careful review of government racial discrimination from the end of Reconstruction until the civil rights movement.

Paul Krugman vs. The Daily Show

In a recent New York Times column (“The Uneducated American”), Paul Krugman writes that, “for the past 30 years our political scene has been dominated by the view that any and all government spending is a waste of taxpayer dollars.” As a result, Krugman continues, U.S. education has been “neglected” and “has inevitably suffered.”

Readers who put their trust in Krugman might thus conclude that per pupil spending has stagnated or declined. In reality, as the chart below reveals, it has more than doubled since 1970, after adjusting for inflation.

Paul Krugman may not be an “uneducated American,” but he’s certainly a badly misinformed one.

andrew coulson cato education spending

Much more troubling is the fact that Krugman and the Times are spreading this misinformation on a grand scale. And that got me thinking about Jon Stewart. When Time magazine recently asked Americans to name their most trusted newscaster, the comic and Daily Show host won in a landslide.  Many pundits have taken this as a sign of the Apocalypse, worrying that so many Americans are getting their facts from a presumptively unreliable source. But is the Daily Show really less reliable than Paul Krugman and the New York Times?

To find out how they stack up on this particular question, I Googled the Daily Show’s website for any discussion of education spending. The most relevant hit was an exchange in the show’s on-line forum. In it, a commenter claims that spending per pupil has risen by a factor of 10 since 1945, after adjusting for inflation. That’s not too far off the mark. The actual multiple is just under 8. So folks who get their facts from the Daily Show’s website will be better informed on this subject than those who trust the Nobel Prize winning New York Times economist.

Not only is Krugman wrong to claim that public schools have been financially “neglected,” he is wrong to imagine that higher public school spending spurs economic growth – which is the central point of his column. Better academic achievement does help the economy – but, as the chart above illustrates and many scholarly studies have demonstrated, higher public school spending does not improve achievement. And by raising taxes without improving achievement, it may actually slow economic growth.

Media elites have been wringing their hands over the collapse in public demand for their products, over the two thirds of Americans who now doubt their credibility, and over the fact that more people now get their information from the Daily Show’s website than the New York Times’s.

Perhaps the media might attract more readers and rebuild trust if they were to stop publishing material less reliable than the blog discussions on a comedy show’s website. Just a thought.

Climate Change and Health Care: Free Lunches?

In the debate over health care reform, advocates of expanded government health insurance suggest we can pay for this by making Medicare and Medicaid more efficient.

In Paul Krugman’s most recent column, he makes a similar claim about reducing greenhouse gas emissions:

The evidence suggests that we’re wasting a lot of energy right now. That is, we’re burning large amounts of coal, oil and gas in ways that don’t actually enhance our standard of living — a phenomenon known in the research literature as the “energy-efficiency gap.” The existence of this gap suggests that policies promoting energy conservation could, up to a point, actually make consumers richer.

Both claims of a “free lunch” are heroic, at best.

In the case of health insurance, Medicare and Medicaid are inefficient, but to make them more efficient we have to reduce government subsidy for health insurance, not expand it.

In the case of energy efficiency, more energy-efficient practices exist (e.g., replacing incandescent light bulbs with CFLs), but they are expensive: if they actually made consumers richer, most would be using them already.

Now the fact that expanded government health insurance and increased energy efficiency would cost more, not less, does not prove they are bad ideas (that’s a separate discussion). But it means society must evaluate a tradeoff, not just assert we can have something for nothing.

C/P Libertarianism, from A to Z

Tuesday Links

  • Paul Krugman claims a victory for Big Government, which he says “saved” the economy from an economic depression. Alan Reynolds debunks his claim and shows why bigger government  produces only bigger and longer recessions.
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