By Casey B. Mulligan
Wednesday, October 21, 2020
Professor Paul Krugman “has a good understanding of the
essentials of international trade (the basis for his Nobel Prize Award) and
explains them well,” I wrote in December in my new book about President Trump and
his economic team. But I added that Krugman “is wrong about most [other]
economic subjects . . . [and] helpful for predicting mistakes that would be
made by the President’s opponents.” Now is a good time to assess whether the
data still support such a harsh evaluation, with special attention to
schooling, the economic recovery, and taxation.
Krugman on schooling
Throughout the summer of 2020, Professor Krugman opined
on the consequences of renewing in-person schooling. I found that remote
learning in the U.S. has an opportunity cost of $1.6
billion per school day because pupils learn more effectively in person. While
still in the realm of obvious economic results, Krugman agreed that “nobody
knows . . . how we can educate America’s children without normal schooling.”
Nevertheless, his amateur and partisan theory of disease trumped that
assessment. He advised
his five million followers that reopening
school this fall would “be
a complete disaster” that “would kill thousands” as it “disastrously
reinforc[ed] the pandemic.”
Israel had an outbreak early in the summer that coincided
with its reopening schools. In his opinion, that by
itself justified withholding hundreds of billions of dollars of human
capital from America’s children. (He showed his followers the series for
Israeli cases through August 1, rather than the less alarming trend for
deaths). Never mind that Sweden had not even closed schools in the spring,
while several other countries reopened (without second waves) before the end of
June. Never mind that already in June the American
Academy of Pediatrics saw “a much smaller role in driving the spread of the
disease than we would expect.” Never mind the promising results from summer
camps and daycare centers here at home.
Many schools did in fact dare to open. The Mulligan
children were enrolled in a couple of them, which were able to deliver
thousands of pupil-days of in-person schooling without a single confirmed case
of COVID-19 among students, faculty, or staff. Using a larger dataset, Brown
University professor
Emily Oster found that “schools aren’t super-spreaders . . . fears from the
summer appear to have been overblown.” Krugman had no business stoking those
fears with an improbable scenario from outside his expertise, when he knew that
the human-capital costs to children of e-learning were enormous and guaranteed.
Krugman on the recovery
This spring Congress hastily prepared a pandemic
assistance package that ultimately proved to pay the unemployed almost $1,000
per week (primarily a special $600 “bonus”), which was more than most of the
beneficiaries were earning before they were laid off. At the macro level, the
package resulted in a record increase in personal incomes at the same time that
production and spending had dropped record amounts. The package, it seems, had
gone too far and needed to be modulated when its major provisions expired
in July.
Professor Krugman had, to put it charitably, a unique
perspective. “I’ve been doing the math, and it’s terrifying . . . the end
of benefits will push down overall consumer spending . . . more than 4
percent,” he wrote in early August. Furthermore, he insisted that drop would be
followed by “a substantial ‘multiplier’ effect, as spending cuts lead to
falling incomes, leading to further spending cuts.”
Although not mentioned to his readers, Krugman’s
conclusion is the opposite of a decades-long consensus in our profession.
Government can help the poor and unemployed with redistributive policies but is
constrained by an “equity-efficiency tradeoff.” Arthur
Okun likened the tradeoff to a leaky bucket, “The money must be carried
from the rich to the poor in a leaky bucket. Some of it will simply disappear
in transit, so the poor will not receive all the money that is taken from the
rich.” If nothing else, a worker should retain at least a small amount of what
he produces rather than giving it all over to the public treasury. Failing to
heed this advice would reduce aggregate output and incomes.
Even putting incentives aside, there is pesky arithmetic.
Aggregate spending includes not only the spending of government program
participants, but also the spending (both consumption and investment) of those
who finance the government. When government redistributes, the taxpayers and
lenders to our government have less to spend and save on other things. Even a
foreign lender who decides to lend that extra $1 million to our government may
well be lending less to U.S. households and companies. At best, redistribution
from workers to the unemployed reallocates demand rather than increasing its
total.
Economics is an empirical science and even Okun’s
tradeoff should continually be compared with real-world data. Let’s look at the spending data beginning in
August when unemployment payments were about $50 billion per month less than
they were before. August retail sales showed a normal monthly increase despite
the absence of so many unemployment bonuses. With the bonuses still gone,
retail sales surged in September.
Professor Krugman’s error is not new. Years ago, he
failed to recognize that there are two fundamentally different types of
government spending. One type is transfers, which often pay people for not
working or producing. The other type is government purchases of goods and
services that pay people for working and producing a good or service for
government use. Transfers and government purchases are economic opposites yet,
as I explain in my
review of his 2012 book, Krugman insists on using studies of the effects of
government purchases (military, road construction, etc.) to project the effects
of government transfers such as unemployment benefits.
Krugman on taxes
Returning to a 2017 theme, Professor Krugman asserts that
“the channel through which corporate tax cuts are supposed to raise wages is .
. . higher investment.” He also concludes that “repealing those corporate tax
cuts won’t reduce wages . . . because of the preponderance of monopoly rents in
modern corporate profits.”
Although I agree that the corporate tax is related to
aggregate investment, I am surprised that he forgot so easily the conclusions
of his generation of public-finance economists. They thought that the economic
damage from business taxes came at least as much from distorting the allocation of
investment across regions, industry, and firms as from reducing the total
amount to be invested. My generation
calls it “misallocations.” A prime example of misallocation is the low
productivity of residential capital as compared with non-residential
business capital. Raising taxes on business only makes that misallocation
worse.
Professor Krugman also seems to forget how monopolies and
cartels exercise their market power, which is to withhold some of their
production in order to jack up prices. The Organization for Petroleum Exporting
Countries (OPEC) is a famous example: They (try) to raise oil prices by
instructing their members to produce less. Even if Krugman were correct that
many corporations are monopolies, taxing them will only cause them to produce
less, exaggerating the misallocation that comes from monopoly. Corporate-tax
revenge on the monopolies may be sweet, but it lowers productivity and wages.
Here’s an idea that they still teach at in-person schools: Use competition policy rather than tax policy to deal with imperfect competition.
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