Boudreau, K, Brady, T, Ganguli, I, Gaule, P, Guinan, E, Hollenberg, A & Lakhani, K 2017, ' A Field Experiment on Search Costs and the Formation of Scientific Collaborations ', Review of Economics and Statistics, vol. 99, no. 4, pp. 565-576 . https://doi.org/10.1162/REST_a_00676