All entries for Monday 15 October 2012
October 15, 2012
Writing about web page http://ideas.repec.org/a/aea/jeclit/v45y2007i1p5-38.html
Tail risks are the risks of worst-case scenarios. The risks at the far left tail of the probability distribution are typically small: they are very unlikely, but not impossible, and once or twice a century they will come about. When they do happen, they are disastrous. They are risks we would very much like to avoid.
How can we compare the tail risks of government intervention with the tail risks of leaving things to the market? Put differently, what is the very worst that can happen in either case? Precisely because these worst cases are very infrequent, you have to look to history to find the evidence that answers the question.
To make the case for government intervention as strong as possible, I will focus on markets for long-term assets. Why? Because these are the markets that are most likely to fail disastrously. In 2005 house prices began to collapse across North America and Western Europe, followed in 2007 by a collapse in equity markets. By implication, these markets had got prices wrong; they had become far too high. The correction of this failure, involving large write-downs of important long term assets, led us into the credit crunch and the global recession.
Because financial markets are most likely to fail disastrously, they are also the markets where many people now think someone else is more likely to do a better job.
What's special about finance? Finance looks into the future, and the future is unexplored territory. Only when that future comes about will we know the true value of the long-term investments we are making today in housing, infrastructure, education, and human and social capital. But we actually have no knowledge what the world will be like in forty or even twenty years' time. Instead, we guess. What happens in financial markets is that everyone makes their guess and the market equilibrium comes out of these guesses. But these guesses have the potential to be wildly wrong. So, it is long-term assets that markets are most likely to misprice: houses and equities. When houses and equities are priced very wrongly, chaos results. (And in the chaos, there is much scope for legal and illegal wrongdoing.)
When housing is overvalued, too many houses are built and bought at the high price and households assume too much mortgage debt. When equities are overvalued, companies build too much capacity and borrow too much from lenders. To make things worse, when the correction comes it comes suddenly; markets in long term assets don't do gradual adjustment but go to extremes. In the correction, nearly everyone suffers; the only ones that benefit are the smart lenders that pull out their own money in time and the dishonest borrowers that pull out with other people’s money. It's hard to tell which we resent more.
If markets find it hard to price long term assets correctly, and tend to flip from one extreme to another, a most important question then arises: Who is there that will do a better job?
It's implicit in current criticisms of free-market economics that many people think like this. Financial markets did not do a very good job. It follows, they believe, that someone else could have done better. That being the case, some tend to favour more government regulation to steer investment into favoured sectors. Others prefer more bank regulation to prick asset price bubbles in a boom and underpin prices in a slump. The latter is exactly what the Fed and the Bank of England are doing currently through quantitative easing.
Does this evaluation stand up to an historical perspective?
We’re coming through the worst global financial crisis since 1929. Twice in a century we've seen the worst mess that long-term asset markets can make -- and it's pretty bad. A recent estimate of the cumulative past and future output lost to the U.S. economy from the current recession, by David H. Papell and Ruxandra Prodan of the Boston Fed, is nearly $6 trillion dollars, or two fifths of U.S. output for a year. A global total in dollars would be greater by an order of magnitude. What could be worse?
For the answer, we should ask a parallel question about governments: What is the worst that government regulation of long term investment can do? We'll start with the second worst case in history, which coincided with the last Great Depression.
Beginning in the late 1920s, the Soviet dictator Stalin increasingly overdid long term investment in the industrialization and rearmament of the Soviet Union. Things got so far out of hand that, in Russia, Ukraine, and Kazakhstan in 1932/33, as a direct consequence, 5 to 6 million people lost their lives.
How did Stalin's miscalculation kill people? Stalin began with a model that placed a high value (or “priority”) on building new industrial capacity. Prices are relative, so this implied a low valuation of consumer goods. The market told him he was wrong, but he knew better. He substituted one person’s judgement (his own) for the judgement of the market, where millions of judgements interact. He based his policies on that judgement.
Stalin’s policies poured resources into industrial investment and infrastructure. Stalin intended those resources to come from consumption, which he did not value highly. His agents stripped the countryside of food to feed the growing towns and the new workforce in industry and construction. When the farmers told him they did not have enough to eat, he ridiculed this as disloyal complaining. By the time he understood they were telling the truth, it was too late to prevent millions of people from starving to death.
This case was only the second worst in the last century. The worst episode came about in China in 1958, when Mao Zedong launched the Great Leap Forward. A famine resulted. The causal chain was pretty much the same as in the Soviet Union a quarter century before. Between 1958 and 1962, at least 15 and up to 40 million Chinese people lost their lives. (We don’t know exactly because the underlying data are not that good, and scholars have made varying assumptions about underlying trends; the most difficult thing is always to work out the balance between babies not born and babies that were born and starved.)
This was the worst communist famine but it was not the last. In Ethiopia, a much smaller country, up to a million people died for similar reasons between 1982 and 1985. If you want to read more, the place to start is “Making Famine History” by Cormac Ó Gráda in the Journal of Economic Literature 45/1 (2007), pp. 5-38. The RePEc handle of this paper is http://ideas.repec.org/a/aea/jeclit/v45y2007i1p5-38.html.
Note that I do not claim these deaths were intentional. They were a by-product of government regulation; no one planned them (although some people do argue this). At best, however, those in charge at the time were guilty of manslaughter on a vast scale. In fact, I sometimes wonder why Chinese people still get so mad at Japan. Japanese policies in China between 1931 and 1945 were certainly atrocious and many of the deaths that resulted were intended. Still, if you were minded to ask who killed more Chinese people in the twentieth century, the Japanese imperialists might well have to cede first place to China's communists. However, I guess there is less national humiliation in it when the killers are your fellow countrymen than when they are foreigners.
To conclude, no one has the secret of correctly valuing long term assets like housing and equities. Markets are not very good at it. Governments are not very good at it either.
But the tail risks of government miscalculation are far worse than those of market errors. In historical worst-case scenarios, market errors have lost us trillions of dollars. Government errors have cost us tens of millions of lives.
The reason for this disparity is very simple. Markets are eventually self-correcting. "Eventually" is a slippery word here. Nonetheless, five years after the credit crunch, worldwide stock prices have fallen, house prices have fallen, hundreds of thousands of bankers have lost their jobs, and democratic governments have changed hands. That's correction.
Governments, in contrast, hate to admit mistakes and will do all in their power to persist in them and then cover up the consequences. The truth about the Soviet and Chinese famines was suppressed for decades. The party responsible for the Soviet famine remained in power for 60 more years. In China the party responsible for the worst famine in history is still in charge. School textbooks are silent about the facts, which live on only in the memories of old people and the libraries of scholars.