Wolfgang F. Stolper, 89, an economist whose work included a theory used to explain the effect of international trade on wages, died Monday in Ann Arbor, Mich., during surgery to clear a blood clot.

There was a big debate about this in the economics profession in the early 1990s. Not one single economist argued about the direction of trade’s effect ? it was universally agreed that it was negative ...

Rising inequality since the 1980s is clearly a serious problem that merits political attention. But focusing solely on trade is not the way to resolve it Inequality has become a major political ...

There has been increased attention on income inequality. Behind this trend is the widening disparity of income in developed countries. Professor Joseph Stiglitz of Columbia University in the United ...

In a famous theorem, known as Stolper-Samuelson, he and a co-author showed that competition from imports of clothes and similar goods from underdeveloped countries, where producers rely on unskilled ...