What is New Trade Theory?

Congratulations to Paul Krugman on his Nobel.  Here is a primer on one of Krugman’s key contributions, New Trade Theory.  Tyler has more links below.

Ricardo showed that every country (and every person) has a comparative advantage, a good or service that they can produce at a lower (opportunity) cost than any other country (or person).  As a result, production is maximized when each country specializes in the good or service that they produce at lowest cost, that is in the good in which they have a comparative advantage.  Since specialization in comparative advantage maximizes production, trade can make every country better off.

But what determines comparative advantage?  In Ricardo it is the natural products of the soil, Portugal is good at producing wine and so England has a comparative advantage in cloth.  Heckscher, Ohlin and Samuelson among others extended the model to show how factor proportions can determine comparative advantage – countries with a lot of labor relative to capital, for example, will tend to have a comparative advantage in labor intensive goods production.

Notice, however, that in the Ricardian model and its extensions the determinants of comparative advantage like geography and factor proportions lie outside of the model.  New Trade Theory of which Paul Krugman can be said to be the founder, brings the determinants of comparative advantage into the model.

Consider the simplest model (based on Krugman 1979).  In this model there are two countries.  In each country, consumers have a preference for variety but there is a tradeoff between variety and cost, consumers want variety but since there are economies of scale – a firm’s unit costs fall as it produces more – more variety means higher prices.  Preferences for variety push in the direction of more variety, economies of scale push in the direction of less.  So suppose that without trade country 1 produces varieties A,B,C and country two produces varieties X,Y,Z.  In every other respect the countries are identical so there are no traditional comparative advantage reasons for trade.

Nevertheless, if trade is possible it is welfare enhancing.  With trade the scale of production can increase which reduces costs and prices.  Notice, however, that something interesting happens.  The number of world varieties will decrease even as the number of varieties available to each consumer increases.  That is, with trade production will concentrate in say A,B,X,Y so each consumer has increased choice even as world variety declines.

Increasing variety for individuals even as world variety declines is a fundamental fact of globalization.  In the context of culture, Tyler explains this very well in his book, Creative Destruction; when people in Beijing can eat at McDonald’s and people in American can eat at great Chinese restaurants the world looks increasingly similar even as each world resident experiences an increase in variety.

Thus, Krugman (1979) can be thought of as providing another reason why trade can be beneficial and a fundamental insight into globalization.

Moreover, Krugman (1979) began the task of bringing the reasons for comparative advantage within the model.  In that paper, Krugman also hypothesizes briefly about what happens when we allow migration within the model.  Recall, that in Heckscher-Ohlin-Samuelson factor proportions explain trade patterns but are themselves determined outside of the model.  When people and capital can move, however, factor proportions are themselves something to be explained.

Krugman (1991) (JSTOR and here) brings increasing returns together with capital and labor migration and transport costs into one model.  Krugman’s (1991) model has become a workhorse of economic geography and international trade.  The model is too complex to explain here but the reasons for that complexity are clear to see – when everything becomes "endogenous" small initial differences can make for big effects.  To minimize transport costs, for example, firms want to locate near consumers but consumers want to locate near work!  Thus, there are multiple equilibria and at a tipping point the location decisions of a single firm or consumer can snowball into big effects.  So Krugman has been a leader in introducing tipping points, network effects and thus the importance of history into international trade as well as into economics more generally. 

Houses for Sale! Houses for Sale!

Tyler and I have both suggested that increased immigration would help to increase the demand for housing and relieve some of the financial crisis.  Writing in the WSJ Lee Ohanian concurs:

We should encourage the immigration of prime-age individuals. Beginning in 2007, net immigration fell to half of its level over the previous five years. Increasing immigration would increase the demand for housing and raise home prices. And note that the benefit would be immediate. Home prices — and the value of subprime obligations — would rise in anticipation of a higher population base. The U.S. particularly needs highly skilled workers. These workers not only would purchase homes, but would generate higher living standards for all Americans.

More generally, Ohanian warns that what made the Great Depression great was the misguided policies that Hoover and Roosevelt adopted to fight the depression.  Ohanian has an ill-considered swipe at Obama on this score but the general point is valid and worth remembering as we rush onwards. 

Why is the Fed Paying Interest on Excess Reserves?

Today the Fed starts to pay interest on reserves.  The zero interest on required reserves was an opportunity cost to banks, a tax if you like, so paying interest lifts the tax.  Reducing taxes on banks at the present time makes sense and in the long run there are some efficiency gains from paying interest on required reserves, especially to the extent that the previous system could be gamed.  Overall, however, this is small potatoes.

More interesting is why the Fed. will pay interest on excess reserves.  In the long run, there are again efficiency gains but why would the Fed. want to make it more profitable for banks to hold excess reserves now when we want every dollar in the credit markets?  My best guess is that the Fed. wants to play more Operation Twist and in Brad DeLong’s terms this gives them an additional tool to do it on the Pan-Galactic scale.  In short, they will buy long bonds and commercial paper or other such asset and use the interest payments on excess reserves to sterilize.  Although paying interest on excess reserves brings this whole operation under the Fed house it’s unclear to me, however, how the situation is markedly different than with Fed/Treasury cooperation.

The Economic Consensus v. Politics

The consensus among economists is now clear, the best strategy for dealing with the financial crisis is to recapitalize the banks that need recapitalization.  Paul Krugman, John Cochrane, Luigi Zingales, Douglas Diamond, Raghuram Rajan and many others all advocate some form of recapitalization as do Tyler Cowen and myself.  Krugman would prefer a recapitalization in the form of nationalization.  In my view, there is still plenty of private money to buy banks at the right price and my preferred model is the FDIC leading a speed bankruptcy procedure, as was done brilliantly with Washington Mutual (Cochrane also supports this model.)  In the middle are most of the others who have a variety of good ideas to require the banks to raise equity in various ways. 

The consensus policy of economists would put most of the burden of adjustment on politically powerful holders of equity and bonds.

There is also a consensus among economists that the bailout bill is not the right policy.  None of the above economists, for example, is enthusiastic about the bailout.  My bet is that all of us think that the bailout has a substantial likelihood of failing.  The support that exists is born out of hope and fear not judgment and experience.  Nevertheless, the political consensus is that a bailout is what we will get whether it is likely to work or not.   

Addendum: Lynne Kiesling draws the Olsonian conclusion.

The Economic Organization of a Prison

A famous paper in economics showed how cigarettes became a medium of exchange in a POW camp (even leading to booms and slumps depending on Red Cross deliveries).  For a long time cigarettes were the money of choice in American prisons as well but today, according to a great piece in the WSJ, the preferred medium of exchange is mackerel.

There’s been a mackerel economy in federal prisons since about 2004,
former inmates and some prison consultants say. That’s when federal
prisons prohibited smoking and, by default, the cigarette pack, which
was the earlier gold standard.

Prisoners need a proxy for the dollar because they’re not allowed to
possess cash. Money they get from prison jobs (which pay a maximum of
40 cents an hour, according to the Federal Bureau of Prisons) or family
members goes into commissary accounts that let them buy things such as
food and toiletries. After the smokes disappeared, inmates turned to
other items on the commissary menu to use as currency…in much of the federal prison system mackerel has become the currency of choice.

I loved this point which raised the possibility of significant mack seignorage.

…Mr. Muntz says he sold more than $1 million of mackerel for federal
prison commissaries last year. It accounted for about half his
commissary sales, he says, outstripping the canned tuna, crab, chicken
and oysters he offers.

Unlike those more expensive delicacies, former prisoners say, the
mack is a good stand-in for the greenback because each can (or pouch)
costs about $1 and few — other than weight-lifters craving protein —
want to eat it.

Thanks to Brandon Fuller for the link.

The Workhouse Test

The new Bailout plan has some interesting restrictions on CEO compensation and golden parachutes.  For example:

…a prohibition on the financial institution making any golden parachute payment to its senior executive officer during the period that the Secretary holds an equity or debt position in the financial institution.

This could either be a disaster or a saving grace.  If you think the situation is very dire and also that Wall Street is ruled by greed then it’s a disaster as the captain may prefer to go down with his ship, rather than give up the golden parachute (life-jacket?).  Thus, those who think the situation is very dire must be gambling on CEO altruism!

On the other hand, if you think that there is still private capital out there ready to buy at the right price then this clause may mean a smaller public bailout than many are predicting.

It all reminds me of the workhouse test.   

Tradeoffs Don’t Exist

Or so say Larry Summers and Mark Thoma who argue that we can have a bailout and a stimulus package and still have tax cuts and more spending on energy, health care, education and all the other goodies that we have been promised.  Salesman Summers explains:

Just as a family that goes on a $500,000 vacation is $500,000 poorer
but a family that buys a $500,000 home is only poorer if it overpays,
the impact of the $700bn programme on the fiscal position depends on
how it is deployed and how the economy performs. The American
experience with financial support programmes is somewhat encouraging.
The Chrysler bail-out, President Bill Clinton’s emergency loans to
Mexico, and the Depression-era support programmes for housing and
financial sectors all ultimately made profits for taxpayers…

Does this sound familiar?  I can hear it now.  A vacation sir is consumption but a home, ah a home, that’s investment.  Investments pay off.  Just look at the American experience.  Rising home prices!  Never a downturn.  Isn’t that encouraging?  Hell, at prices like these you can hardly afford not to buy.  Yes sir, a home that’s a wise investment.  And that makes you sir, a wise investor.  And a wise investor, well a wise investor can certainly afford a nice vacation.    

Not from The Onion: The Teenage Put

Parents are abandoning teenagers at Nebraska hospitals, in a case of a well intentioned law inspiring unintended results.

Over the last two weeks, moms or dads have dropped off seven teens
at hospitals in the Cornhusker state, indicating they didn’t want to
care for them any more.

Under a newly implemented law, Nebraska is the only
state in the nation to allow parents to leave children of any age at
hospitals and request they be taken care of, USA Today notes. So-called
“safe haven laws” in other states were designed to protect babies and
infants from parental abandonment.

..The moral of this story appears to be that safe haven
laws need to be very carefully and narrowly written to ensure they’re
not abused by parents.

From now on I will will tell my kids, "Behave! or we’re moving to Nebraska!"

Substitute Bridges

Binyamin Appelbaum at the Washington Post should get an award for writing a story so much at odds with the conventional wisdom.

Banks throughout the United States carried on with the business of
making loans yesterday even as federal officials warned again that
their industry is on the verge of collapse, suggesting that the
overheated language on Capitol Hill may not reflect the reality on many Main Streets.

…. many smaller banks said they were actually benefiting from the problems on Wall Street. Deposits are flowing in as customers flee riskier investments, and well-qualified borrowers are lining up for loans.

"We collect money from local savers, and we lend it in the local community," said William Dunkelberg, chairman of Liberty Bell Bank
in Cherry Hill, N.J. "We’re doing fine. There are 9,000 financial
institutions out there, and most of them are small and most of them are
doing fine."

Dunkelberg, a professor of economics at Temple University and chief economist for the National Federation of Independent Business,
added that a recent survey of that group’s members found that only 2
percent said getting a bank loan was the great challenge facing their
businesses.

Even some of the nation’s largest banks, which have pushed hard for a
federal bailout, deny that the current situation is forcing them to
reduce lending. "The strength of our core businesses, capital and
liquidity are enabling us to continue to support our customers," Bank of America, the nation’s largest bank, said in a statement. It added, however, that the bailout plan would allow more lending.

The most recent Federal Reserve
data show that the volume of outstanding bank loans declined 0.5
percent from the last week of August to the second week of September,
though it was up more than 6 percent from the corresponding time last
year.

The article goes on to discuss some of the real problems in the industry and do bear in mind that the majority of deposits are in big banks.  Nevertheless, I found the perspective valuable.  As I have argued, we should be paying more attention to the institutions that are doing well and can serve as substitute bridges to keep credit flowing to firms with valuable projects.  I have also advocated increasing savings with a temporary savings stimulus package – this could involve expanding and making contributions to Roth IRAs tax deductible or something like promising no taxes on CD investments of 1 year maturity or longer that are made in the next year .

Is a Potential Bailout Making Things Worse?

Ken Rogoff says yes.  Elizabeth Warren at Credit Slips summarizes Rogoff’s discussion at a Harvard Roundtable (video):

Any liquidity crisis is caused by the promise of a government
bailout. Ken said [Actually this was Greg Mankiw, AT] that his many friends in investment banking said that
there is plenty of money to invest in financial services, but right now
it is "sitting on the sidelines."  Why?  Because the financial services
industry does not want to pay the terms required to get that money back
in circulation (e.g., give up equity).  As he put it, why do business
with Warren Buffett who will negotiate a tough deal, if you believe
that the government will ride in soon with cheaper cash? 

Ken [this is correct, AT] also talked about the need to shrink the financial services
sector. He thinks it is good that the investment banking houses are
failing and many people on Wall Street are losing their jobs because,
in his view, we have an oversupply in that sector and our economy just
can’t support it.   

Ken’s background with the IMF and on the Board of the Federal
Reserve add a certain credibility to his assessment of conditions on
Wall Street.  If he is right, the $700 bailout is saving some
investment bankers’ jobs in the short term, but overall it is just
making the financial system worse.

In a related point Felix Salmon suggests that the Ted Spread may not be a valid measure of distress when the Fed is providing lots of liqudity.

…if you’re a bank, you really neither want nor need three-month
interbank funding right now. Global central banks, led by the Federal
Reserve, have flooded the system with so much overnight liquidity that
you can get as much cash as you need, at a much lower interest rate,
directly from your central bank, overnight. The choice between that and
locking in a high interest rate for three months is a no-brainer.

The WaMu Speed Bankruptcy

The Washington Mutual "speed bankruptcy" seems like a good model for the rest of the industry.  The FDIC took over the bank, wiped out the shareholders, and immediately auctioned it off to JP Morgan who paid $1.9 billion. Depositors are secure.

Notice that to do the deal, JP Morgan raised $10 billion in the equity markets and their shares rose.  Moreover, the issue was oversubscribed so they may go back for more.  All this illustrates that at least some of the substitute bridges from savers to investors that I have talked about continue to work (on the latter point see also Arnold Kling and Steve Landsburg). 

Hat tip to Garrett Jones.