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A Theory of Social Comparison Processes

Hypothesis I: There exists, in the human organism, a drive to evaluate his opinions and his abilities. While opinions and abilities may, at first glance, seem to be quite differ...

1954 Human Relations 19493 citations

Increasing Returns and Long-Run Growth

This paper presents a fully specified model of long-run growth in which knowledge is assumed to be an input in production that has increasing marginal productivity. It is essent...

1986 Journal of Political Economy 19485 citations

Principles of Optics

The book is comprised of 15 chapters that discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals. The te...

1999 Cambridge University Press eBooks 18784 citations