Why do some social insects have sophisticated recruitment systems, while other species do not communicate about food source locations at all? To answer this question, it is necessary to identify the social or ecological factors that make recruitment adaptive and thus likely to evolve. We...

Economic and social scientists are increasingly interested in historical data, but many relevant sources are still available in analog form, limiting accessibility and research potential. This article introduces the WBdigital database, which aims to improve this situation. The database provides...