NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Christopher Liu

Rotman School of Management
University of Toronto
105 St. George Street
Toronto, Ontario
Canada M5S 3E6
Tel: 416.978.5268
Fax: 416.978.4629

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NBER Working Papers and Publications

July 2014The (Changing) Knowledge Production Function: Evidence from the MIT Department of Biology for 1970–2000
with Annamaria Conti
in The Changing Frontier: Rethinking Science and Innovation Policy, Adam B. Jaffe and Benjamin F. Jones, editors
Considerable attention has been focused, in recent years, on the role that graduate and postdoc students play in the production of academic knowledge. Using data from the MIT Department of Biology for the period 1970-2000, we analyzed the changes over time of four fundamental aspects of their productivity: i) training duration; ii) time to a first publication; iii) productivity over the training period; and iv) collaboration patterns with other scientists. We identified four main trends that are common to graduate students and postdocs. First, training periods have increased for later cohorts of graduate and postdoc students. Second, later cohorts tend to publish their initial first-author article later than the earlier cohorts. Third, they produce fewer first-author publications. Finally,...
April 2014The (Changing) Knowledge Production Function: Evidence from the MIT Department of Biology for 1970-2000
with Annamaria Conti: w20037
Considerable attention has been focused, in recent years, on the role that graduate and postdoc students play in the production of academic knowledge. Using data from the MIT Department of Biology for the period 1970-2000, we analyze the evolution over time of four fundamental aspects of their productivity: i) training duration; ii) time to a first publication; iii) productivity over the training period; and iv) collaboration with other scientists. We identified four main trends that are common to graduate students and postdocs. First, training periods have increased for later cohorts of graduate and postdoc students. Second, later cohorts tend to publish their initial first-author article later than the earlier cohorts. Third, they produce fewer first-author publications. Finally, colla...

Published: The (Changing) Knowledge Production Function: Evidence from the MIT Department of Biology for 1970–2000, Annamaria Conti, Christopher C. Liu. in The Changing Frontier: Rethinking Science and Innovation Policy, Jaffe and Jones. 2015

 
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