English Abstract: Economic thought evolved over the past two centuries to focus on individual behavior as the basis for all economic activity. Some heterodox economists have pointed to the importance of group behavior and the influence of organizations on economic activity, but the neoclassical...

How does government regulation influence the structure of industries? In the coal mining industry, increased safety can be provided with personal protection devices or with engineering controls; but the type of safety standard imposed is important because larger producers have a comparative...

This paper develops a gravity model of immigration. Tests of the model using panel data for 16 OECD countries for 1991-2000 confirm the model's high explanatory power, and examples illustrate its usefulness for testing other hypothesized determinants of immigration.