Software engineering is a field with strong geographic concentration, with Silicon Valley as the epitome of a tech cluster. Yet, most studies on the productivity effects of agglomerations measure innovation with patent data, thus capturing only a fraction of the industry's activity. With data...

Searching for external knowledge has frequently been characterized as crucial for firm success. However, little is known about how the direction of search strategies influences innovation performance. In this paper, we argue that firms need to specialize their search strategy and that its...