Impact of Inbreeding on Scientific Productivity: A Case Study of a Japanese University Department

Research Evaluation, Forthcoming

28 Pages Posted: 17 Jan 2015

See all articles by Noriyuki Morichika

Noriyuki Morichika

University of Tokyo - Department of Technology Management for Innovation

Sotaro Shibayama

Lund University - Department of Business Administration; University of Tokyo

Date Written: December 15, 2014

Abstract

Recent science policies emphasize academic mobility and denounce inbreeding as an impediment to scientific productivity. This study aims to investigate the impact of inbreeding on productivity, distinguishing various forms of inbreeding, and to explore the mechanism behind which inbreeding is translated into productivity, drawing on in-depth longitudinal data of academics’ careers in a university department in Japan. The results suggest that the effect of inbreeding on productivity differs with the organizational levels (university, department, and laboratory) with which inbreeding is defined, as well as with past affiliation to other institutions (purely inbred vs. silver-corded). A negative effect on productivity is indicated for inbreeding that occurs at the department level, which seems to be partly explained by non-merit-based employment criteria. The results also suggest that laboratories consisting of higher rates of their own graduates yield lower productivity. Finally, inbred academics tend to change research subjects less frequently over their career, implying that inbreeding may cause rise-averseness and deter creativity.

Keywords: Inbreeding, Mobility, Academic labor market, Scientific productivity, Creativity

JEL Classification: O31, I23

Suggested Citation

Morichika, Noriyuki and Shibayama, Sotaro, Impact of Inbreeding on Scientific Productivity: A Case Study of a Japanese University Department (December 15, 2014). Research Evaluation, Forthcoming. Available at SSRN: https://ssrn.com/abstract=2550694

Noriyuki Morichika

University of Tokyo - Department of Technology Management for Innovation ( email )

Tokyo
Japan

Sotaro Shibayama (Contact Author)

Lund University - Department of Business Administration ( email )

Box 117
SE-221 00 Lund, S-220 07
Sweden

University of Tokyo ( email )

Hongo 7-3-1
Bunkyo-ku
Tokyo, Tokyo 113-8656
Japan

HOME PAGE: http://sotaroshibayama.weebly.com/

Register to save articles to
your library

Register

Paper statistics

Downloads
72
rank
317,169
Abstract Views
559
PlumX Metrics