This 1997 book is the second volume of three comprising papers which examine the latest developments in economic theory, applied economics and econometrics presented at the Seventh World Congress of the Econometric Society in Tokyo in August 1995. The topics were carefully selected to represent the most active fields in the discipline over the past five years. Written by the leading authorities in their fields, each paper provides a unique survey of the current state of knowledge in economics. Designed to make the material accessible to a general audience of economists, these volumes should be helpful to anyone with a good undergraduate training in economics who wishes to follow new ideas and tendencies in the subject.