Empirical studies have found high correlation between entry and exit across industries, indicating that industries differ substantially in their degree of firm turnover. I propose a computational model of dynamic oligopoly with entry and exit in a turbulent technological environment. I examine...

We develop an agent-based computational model for the spatial spread of an epi- demic to explore how the inter-regional variability in vaccine coverage a§ects the global epidemic size as well as the individual risk of infection. Our agent-based model imple- ments a standard SIR model of...

A computational model of a retail chain is developed in which store managers continually search for better practices through innovation. The search is carried out over a rugged landscape defined over the space of store practices with profit being determined by the interaction of a store's...