Author Archives: James_Hamilton

OPEC production cut

The Wall Street Journal reported on Thursday:

OPEC said its members agreed that they need to cut crude output to reduce the world’s supply glut, a shift for the 14-member group that was enough to send oil prices higher, even though reaching a deal remains far from certain.

Members of the Organization of the Petroleum Exporting Countries said they reached an understanding after a six-hour gathering in the Algerian capital, but deferred until November the fraught task of finalizing a plan to make those cuts. OPEC officials said a committee would be formed to determine how much each country would have to cut and then report to the group at its next meeting on Nov. 30 in Vienna.

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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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