Notes, Comments and Preliminary results Oct 09 2012 Richard Ruble and Bruno Versaevel   On the tacit collusion equilibria of a dynamic duopoly investment game   Abstract  Contact Information  Citation  Full Text  -  Note   Nov 02 2008 Bruno Versaevel and Désiré Vencatachellum   Horizontal R and D cooperation and spillovers: evidence from France   Abstract  Contact Information  Citation  Full Text  -  Note