Horizontal scope--the set of products and services offered--is an important dimension of firm strategy and a potentially significant source of competitive advantage. On one hand, the ability to build close buyer-supplier relationships over multiple transactions can give an advantage to broad...

We develop a formal model of the timing of resource development by competing firms. Our aim is to deepen and extend resource-level theorizing about sustainable competitive advantage. Our analysis formalizes the notion of barriers to imitation, particularly those based on time compression...