As he and other economists acknowledge in a symposium in the July Economic Journal, there is no clear-cut theoretical answer to the question of whether regional trade agreements are good or bad, and the empirical findings are hotly disputed.

ECONOMIST: Do regional trade agreements encourage free trade?

The findings are being presented this week at the annual San Antonio Breast Cancer Symposium and were published online Wednesday by the New England Journal of Medicine.

WSJ: Breast-Cancer Drugs Raise Hopes