Author Archives: James_Hamilton

Why you should never use the Hodrick-Prescott filter

A common problem in economics is that most of the variables we study have trends. Even the simplest statistics like the mean and variance aren’t meaningful descriptions of such variables. One popular approach is to remove the trend using the Hodrick-Prescott filter. I’ve just finished a new research paper highlighting the problems with this approach and suggesting what I believe is a better alternative.
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Helicopter money

Despite aggressive actions by central banks, many of the world’s economies are still stagnating and facing new shocks, leading to renewed calls for helicopter money as a serious policy prescription for countries like Japan and the U.K.. And, if things go badly, maybe the United States?
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