’ ego-networks employing a unique panel dataset for the full population of 233 German laser source manufactures between 1990 … panel data count model with fixed effects are suggestive of direct innovation effects due to individual cooperation events …

; timing of network entry ; innovation networks ; German laser industry … level. We apply a unique longitudinal event history dataset based on the full population of 233 German laser source …

Empirical evidence on the evolution of innovation networks within high-tech industries is still scant. We investigate … network formation processes by analyzing the timing of firms to enter R&D cooperations, using data on laser source … manufacturers in Germany, 1990-2010. Network measures are constructed from a unique industry database that allows us to track both …