Jenny Lanjouw, a Yale economist, proposes that companies could patent a new drug in the industrialized world or in the developing countries, but not both.

To see how big the future economic costs could be, consider a study prepared by William D. Nordhaus, a Yale economist.

A ratio devised by a Yale economist that values assets suggests it is.

These findings are consistent with a narrow but striking study by Ebonya Washington, a Yale economist.

Throughout history, people have typically underestimated the cost of war, as William Nordhaus, a Yale economist, has pointed out.

William Nordhaus, a Yale economist who also worked on the report, says that the impact of gradual global warming would be relatively modest.

Robert Shiller, a Yale economist and critical observer of the housing market, says that home prices doubled between 2000 and 2006.

And lo and behold, a Yale economist has stepped forward, tongue only partly in cheek, to provide exactly that.

"The task of public policy should not be a balanced budget come hell or high water," warns William Nordhaus, a Yale economist.

One chair away was Robert J. Shiller, a largely unknown Yale economist.