Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
The voluminous empirical research on horizontal productivity spillovers from foreign investors to domestic firms has yielded mixed results. In this paper we collect 1,205 estimates of spillovers and examine which factors influence spillover magnitude. Our results suggest that horizontal spillovers are on average zero, but that their sign and magnitude depend systematically on the characteristics of the domestic economy and foreign investors. Foreign investors who form joint ventures with domestic firms and who come from countries with a modest technology edge create the largest benefits for the domestic economy.