"Artisans travelled all over Europe in the pre-modern period, and they were responsible for many technical innovations and new consumer products. This volume moves away from the model of knowledge 'transfer' and, drawing on new understandings of artisan work, considers the links between artisan...

We fully solve an assignment problem with heterogeneous firms and multiple heterogeneous workers whose skills are imperfect substitutes, that is, when production is submodular. We show that sorting is neither positive nor negative and is characterized sufficiently by two regions. In the first...