Alonso-Borrego, CésarGalán-Zazo, José I.Forcadell, Francisco JavierZúñiga-Vicente, José ÁngelUniversidad Carlos III de Madrid. Departamento de Economía2012-05-232012-05-232012-042340-5031https://hdl.handle.net/10016/14386This survey examines the empirical literature on the relationship between public R&D subsidies and private R&D investment over the past five decades. The survey reveals a considerable heterogeneity of empirical results that cannot be explained fully by methodological issues. We aim to provide further explanations of the possible causes of that heterogeneity. In particular, we emphasise a set of issues that, in our view, are critical to understanding the potential effect of public R&D subsidies on private R&D spending. Special attention is paid to the dynamic aspects and composition of firm R&D, the constraints faced by the firm (such as financial constraints), and the amount and source of public subsidies. None of these issues have been investigated in depth. We formulate a set of research assumptions to guide future empirical research in this field.application/pdfengAtribución-NoComercial-SinDerivadas 3.0 EspañaPublic subsidiesR&D investmentInnovationworking paperH54L22L52O31O38Economíaopen accessDT/0000000872we1215