Geography, Ties, and Knowledge Flows: Evidence From Citations in Mathematics

59 Pages Posted: 2 May 2018

See all articles by Keith Head

Keith Head

University of British Columbia (UBC) - Sauder School of Business

Yao Amber Li

Hong Kong University of Science and Technology - School of Business and Management, Department of Economics; HKUST IEMS (Institute for Emerging Market Studies)

Asier Minondo

University of Deusto - Deusto Business School

Multiple version iconThere are 2 versions of this paper

Date Written: March 27, 2018

Abstract

Using data on academic citations, career and educational histories of mathematicians, and disaggregated distance data for the world's top 1000 math departments, we study how geography and ties affect knowledge flows among scholars. The ties we consider are coauthorship, past colocation, advisor-mediated relationships, and alma mater relationships (holding a Ph.D. from the institution where another scholar is affiliated). Logit regressions using fixed effects that control for subject similarity, article quality, and temporal lags, show linkages are strongly associated with citation. Controlling for ties generally halves the negative impact of geographic barriers on citations. Ties matter more for less prominent and more recent papers and show no decline in importance in recent years. The impact of distance --- controlling for ties --- has fallen and is statistically insignificant after 2004.

Keywords: Knowledge Diffusion, Distance, Borders, Networks, Academic Genealogy

JEL Classification: F1, O3, R1

Suggested Citation

Head, Keith Charles and Li, Yao Amber and Minondo, Asier, Geography, Ties, and Knowledge Flows: Evidence From Citations in Mathematics (March 27, 2018). Available at SSRN: https://ssrn.com/abstract=3163679 or http://dx.doi.org/10.2139/ssrn.3163679

Keith Charles Head (Contact Author)

University of British Columbia (UBC) - Sauder School of Business ( email )

2053 Main Mall
Vancouver, BC V6T 1Z2
Canada
604-822-8492 (Phone)
604-822-8477 (Fax)

Yao Amber Li

Hong Kong University of Science and Technology - School of Business and Management, Department of Economics; HKUST IEMS (Institute for Emerging Market Studies) ( email )

Department of Economics, Hong Kong U of Sci&Tech
Clear Water Bay, Kowloon, Hong Kong SAR, China
Kowloon
Hong Kong

HOME PAGE: http://yaoli.people.ust.hk/

Asier Minondo

University of Deusto - Deusto Business School ( email )

Camino de Mundaiz, 50
San Sebastian, 20012
Spain

HOME PAGE: http://paginaspersonales.deusto.es/aminondo/

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