The Role of Search in University Productivity: Inside, Outside, and Interdisciplinary Dimensions

51 Pages Posted: 9 Nov 2009 Last revised: 5 Apr 2015

See all articles by James D. Adams

James D. Adams

Dept of Economics, Rensselaer Polytechnic Institute; National Bureau of Economic Research (NBER)

Roger Clemmons

University of Florida - Institute for Child Health Policy

Date Written: November 2009

Abstract

Due to improving information technology, the growing complexity of research problems, and policies designed to foster interdisciplinary research, the practice of science in the United States has undergone significant structural change. Using a sample of 110 top U.S. universities observed during the late 20th century we find that knowledge flows, both in total and in their major components, are a significant and positive determinant of research output. Outside knowledge-flows from other universities have increased at a faster rate than inside flows from the same university. Over time, the importance of outside flows for research output has risen, and it has done so at a faster rate than the importance of inside flows has decreased. Thus the overall contribution of knowledge-flows has increased and has shifted towards outside flows.Turning to knowledge-flows by field, we find that interdisciplinary knowledge-flows have increased only slightly relative to same field flows, despite policy initiatives that favor interdisciplinary research. Moreover, the importance of interdisciplinary flows for research output, while positive and statistically highly significant, has stayed about the same, even as same field flows have become more important, probably because of growth in cyber infrastructure. Although a final verdict is yet to be reached, one interpretation is that interdisciplinary research is still in its early stages. While interdisciplinary flows have begun to increase, the resulting discoveries, and their influence on subsequent research, may still lie in the future.

Suggested Citation

Adams, James D. and Clemmons, J. Roger, The Role of Search in University Productivity: Inside, Outside, and Interdisciplinary Dimensions (November 2009). NBER Working Paper No. w15489. Available at SSRN: https://ssrn.com/abstract=1501513

James D. Adams (Contact Author)

Dept of Economics, Rensselaer Polytechnic Institute ( email )

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National Bureau of Economic Research (NBER) ( email )

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J. Roger Clemmons

University of Florida - Institute for Child Health Policy ( email )

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Gainesville, FL 32610-0147
United States

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