“…Migration, especially of scientists and inventors, can affect the stock of technological knowledge available in developing countries negatively through direct depletion coming from brain drain, quite obviously, but also positively, by creating opportunities for co-inventorship and R&D outsourcing as well as by favoring the circulation and diffusion of knowledge. Studies using information on inventors' ethnicities (Kerr, 2008;Breschi and Lissoni, 2009;Agrawal et al, 2011;Kerr and Kerr, 2018) or on actual origins (Miguélez, 2018) have uncovered evidence of both. For example, Miguélez (2018) investigates the effect of diaspora inventors networks on two outcomes of interest from the perspective of developing countries: collaborative patents between home and host countries (i.e., co-inventorship), and R&D offshoring (i.e., collaborations between applicants in developed countries and inventors in developing countries).…”