Karl Shell

Karl Shell (born May 10, 1938) is an American theoretical economist, specializing in macroeconomics and monetary economics.

Karl Shell
InstitutionCornell University
University of Pennsylvania
MIT
Alma materStanford University
Princeton University
Doctoral
advisor		Kenneth Arrow
Hirofumi Uzawa
Information at IDEAS / RePEc

Shell received an A.B. in mathematics from Princeton University in 1960. He earned his Ph.D. in economics in 1965 at Stanford University, where he studied under Nobel Prize in Economics winner Kenneth Arrow and Hirofumi Uzawa.

Shell is currently Robert Julius Thorne Professor of Economics at Cornell University (succeeding notable economist and airline deregulator Alfred E. Kahn in the Thorne chair). He previously served on the economics faculty at MIT and the University of Pennsylvania.

Shell has been editor of the Journal of Economic Theory, generally regarded as the leading journal in theoretical economics, since its inception in 1968.

Contributions to economics

While Shell has published academic articles on numerous topics in economics, he is primarily known for his contributions in three areas.

Between 1966 and 1973, Shell published three papers on inventive activity, increasing returns to scale, industrial organization, and economic growth. This contribution was important in its day, and later influenced the development of "new growth theory." Among others, Paul Romer cited and heavily built upon Shell's work in his seminal papers on endogenous growth theory.

Shell also made important contributions to the overlapping generations literature (and was perhaps the first to refer to the overlapping generations model by its modern name). The overlapping generations model is now a workhorse in modern macroeconomics and monetary economics.

Karl Shell is also co-inventor (with David Cass) of the concept of sunspot equilibrium (and sunspots).[1]

References
  1. David Cass; Karl Shell (1983). "Do Sunspots Matter?". Journal of Political Economy. 91 (2): 193–227. doi:10.1086/261139. JSTOR 1832054. S2CID 1981980.

Publications
  • Karl Shell, "Toward a Theory of Inventive Activity and Capital Accumulation", American Economic Review, Vol. 56(2), May 1966, 62-68.
  • Karl Shell, "A Model of Inventive Activity and Capital Accumulation" in Essays on the Theory of Optimal Economic Growth (K. Shell, ed.), Cambridge, Massachusetts: MIT Press, 1967, Chapter IV, 67-85.
  • Karl Shell, "Notes on the Economics of Infinity", Journal of Political Economy, Vol. 79(5), September/October 1971, 1002-1011.
  • Karl Shell, "Inventive Activity, Industrial Organization and Economic Growth" in Models of Economic Growth (J.A. Mirrlees and N. Stern, eds.), London: Macmillan, and New York: Halsted (John Wiley & Sons), 1973, 77-100.
  • David Cass and Karl Shell, "Do Sunspots Matter?", Journal of Political Economy, Vol. 91(2), April 1983, 193-227.
  • Karl Shell, "Sunspot Equilibrium", The New Palgrave: A Dictionary of Economics, 2nd Edition (L. Blume and S. Durlauf, eds.), New York: Palgrave Macmillan, 2008.
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