One of the major goals in strategic management research is to identify firm-related and ind- try-related sources and determinants of profitability differences among firms. Accordingly, essential theoretical views explaining superior economic performance of firms include (1) competitive advantages realized by firms compared to their rivals and (2) industry structural characteristics. Both became prominent in strategic management research by the seminal work of Michael Porter who originally distinguished two corresponding performance effects, the positioning effect and the industry effect. Many...