It is high praise when so expert a * scholar as Samuel Hollander (1980) hails my canonical classical model (1978) as likely to become locus classicus for the next generation of textbook writers. Like Fletcher I care not who makes a nation's laws if I can shape its textbook writers' songs. But with power comes responsibility. I must weigh and respond to the doubts Dr. Hollander raises about some positions I took in the three-seventeenths of my positivistic text that digresses to interpret particular historical controversies. I shall be brief and deal only with most essential points.

This paper studies trade theory for the case of a continuum of goods, two factors, two countries, and Cobb-Douglas demand functions. If factor endowments are similar, factor price equalization obtains and geographic patterns of production are indeterminate; nonetheless the effects of changes in factor endowments on prices and welfare in each country are well defined. Factor price equalization does not obtain if factor endowments are far apart, and the geographic pattern of specialization is then determinate. The effects of changes in endowments on the range of goods produced in each country and on prices of goods and factors are analyzed for this case, and the elasticity of substitution in production is shown to play an important role in determining comparative static outcomes.