Wilko Letterie holds a Master degree in Econometrics and a PhD from the Erasmus University Rotterdam. Currently he is associate professor at the department of Organization and Strategy at the Maastricht University School of Business and Economics. His research interests revolve around two themes. First, he studies the formation of networks and investigates how inter-firm linkages affect firm performance. Secondly, he is interested in structural models that can be used to explain patterns of organizational change. In particular he studies factor demand decisions by firms at the micro level.