Brad DeLong on Greenspan

Back in the second half of the 1990s, various people went into Alan Greenspan's office. "Raise interest rates!" they said. "Let unemployment go up! The Phillips curve can't have shifted in this far! The natural rate of unemployment can't have fallen so far so fast! These stock market valuations can't be rational! We are headed for a big crash, or a big inflationary spiral--unless you change course now!"

Alan Greenspan responded that there was no sign of overly-tight labor demand, no sign of accelerating demand-pull or wage-push inflation that would warrant interest rate increases. People were indeed investing enthusiastically in high-tech start-ups and those buying stocks at outsized price-earnings ratios. But the people doing the buying and investing were relatively well-off, and were grownups. If it turned out to be a serious bubble, and if the unwinding of the bubble triggered a financial panic and threatened to produce a high-unemployment recession, then would be the moment for the Federal Reserve to step in and clean up the mess. In the meanwhile, it would be a shame to destroy millions of jobs and wreck a period of 4%+ economic growth just because the Federal Reserve thought that it knew better than grownup investors what prices they should be paying for stocks and shares in high-tech startups, and feared that there might be trouble in the future.

Similarly, in the middle years of the decade of the 2000s, various people went into Alan Greenspan's office. "Raise interest rates!" they said. "Let unemployment go up! Long-term interest rates cannot stay this low for long! The sustainable pace of construction can't have risen so far so fast! These real estate valuations can't be rational! We are headed for a big crash, or a big inflationary spiral--unless you change course now!"

Alan Greenspan responded that there was no sign of overly-tight labor demand, no sign of accelerating demand-pull or wage-push inflation that would warrant interest rate increases. People were indeed building houses and buying mortgages and taking out home-equity loans enthusiastically at outsized price-rental and mortgage-value income ratios. But the people doing the buying and investing were relatively well-off, and were grownups. If it turned out to be a serious bubble, and if the unwinding of the bubble triggered a financial panic and threatened to produce a high-unemployment recession, then would be the moment for the Federal Reserve to step in and clean up the mess. In the meanwhile, it would be a shame to destroy millions of jobs and wreck a period of 3%+ economic growth just because the Federal Reserve thought that it knew better than grownup investors what prices they should be paying for mortgages and houses, and feared that there might be trouble in the future.

The unwinding of the dot-com bubble in 2000-2002 went remarkably well: no significant macroeconomic distress, and less financial panic and distress than I believed possible. The unwinding of the real estate bubble in 2007-2009 is so far not going well. There is, by contrast, more financial distress than I believed possible. Who thought that quantitatively sophisticated hedge funds would have enormous unhedged exposure to subprime risk? Who would have thought that highly-leveraged investment banks with an originat-and-sell business model would keep lots of the securities they had originated in their own portfolios--and kept them because they were high yield for their rating, i.e., because the market did not believe they were as low risk as the investment banks had bamboozled the ratings agencies into claiming? Who would have thought that those buying subprime mortgage securities from the likes of Countrywide had done no investigation into how Countrywide was screening out borrowers?

But so far--look: In the dot-com boom of the 1990s we were the winners. The rich investors of America built out a huge amount of fiber-optic cables and conducted an enormous amount of experimentation in business models from which we all benefit. In the real-estate boom of 2000s the rich investors of America and the world built an extra four million houses and loaned the rest of us money at remarkably low interest rates for five years. Those who moved into newly-built houses with teaser-rate mortgages wish those teaser rates would continue--but they won't, and in the meantime they got to live in a nice house for quite a low rent. Those of us who took out big home equity loans wish the low interest rates would continue--but they won't. And those of us who felt rich because our house values have appreciated wish we still could think of ourselves as sleeping on a pile of gold--but we can't.

The dot-com bubble and the real-estate bubble were bad news for the investors in Webvan, WorldCom, Countrywide, FNMA, and securitized subprime mortgages. But they were, by and large, good news for the rest of us. And investors are supposed to take care of themselves.

Now we are not yet out of the woods. If the tide of financial distress sweeps the Fed and the Treasury away--if we find ourselves in a financial-meltdown world where unemployment or inflation kisses 10%--then I will unhappily concede, and say that Greenspanism was a mistake. But so far the real economy in which people make stuff and other people buy it has been remarkably well insulated from panic at 57th and Park and on Canary Wharf.

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