I joined the SJSU Economics faculty in 1976, and taught until retirement in 1999. My principles of economics courses
focused on using basic concepts to analyze the behavior of individuals and institutions (business firms and governments),
illustrated with many graphs but with little mathematics (nothing beyond very elementary algebra). My upper division and graduate
courses also focused on concepts, but added a major emphasis on building and using formal mathematical models to describe concepts
more precisely, and then to analyze rigorously the relationships and interactions among them.
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