Evolutionary approaches in economics have gathered increasing support over the last 25 years. Despite an impressive body of literature, economists are still far from formulating a coherent research paradigm. The multitude of approaches in evolutionary economics poses problems for the development...

How much heterogeneity in techniques of production exists within the economy, and how does that heterogeneity move over time? In this paper we show that the range of production techniques employed by establishments within individual manufacturing industries is large. We go on to show that...