Pierre Azoulay, Christian Fons-Rosen and Joshua S. Graff Zivin, Working Paper 21788 (National Bureau of Economic Research, 2015). DOI: 10.3386/w21788
Pierre Azoulay, Christian Fons-Rosen and Joshua S. Graff Zivin, Working Paper 21788 (National Bureau of Economic Research, 2015). DOI: 10.3386/w21788