Publications

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Motivation and Personality

Perspectives on Sexuality Sex Research - an Overview Part 1. Biological Perspectives: Sexual Anatomy 1. Sexual Physiology 2. Human Reproduction 3. Birth Control 4. Abortion Part...

1997 15228 citations

Endogenous Technological Change

Growth in this model is driven by technological change that arises from intentional investment decisions made by profit-maximizing agents. The distinguishing feature of the tech...

1990 Journal of Political Economy 15024 citations