There is growing evidence that firms increasingly adopt open innovation practices. In this paper we investigate the … impact of two such external knowledge acquisition strategies, "buy" and "cooperate", on firm's product innovation performance … while both "buy" and "cooperate" have a positive effect on innovation, there is little statistical evidence that using them …

This paper compares the determinants and the effects of innovation cooperation on innovation performance at firm level …. In a third step we investigate the impact of all four categories of cooperation on innovation performance. -- national … innovation cooperation ; international innovation cooperation ; innovation performance …