Lukas Kuld, John O'Hagan, 16 December 2017

Many theories have been posited for the growth in co-authorship in economic research output. This column uses new findings to assess the viability of the different explanations. Lower costs of global communication and increased pressure to produce greater research output play a role, but more information on hiring, promotional, and funding practices is required to assess the relative importance of the various factors behind the trend.

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