Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We use a laboratory experiment to study the link between cooperative research and development (R&D) in clean technology and collusion in a downstream product market in the presence of a time‐consistent emissions tax. Such a tax creates additional interconnections between firms, in addition to the standard technological spillovers. Our results show a strong link between R&D cooperation and market collusion under symmetric R&D spillovers in a duopoly, but when the spillovers are asymmetric, R&D cooperation does not necessarily result in collusion. With symmetric spillovers, the link between R&D cooperation and collusion remains strong even in three‐ and four‐firm industries. (JEL C90, L5, O30, Q55)