Extreme Value Theory with Heterogeneous Agents
异质性主体下的极值理论AI 解读 ↓
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Extreme value processes feature in any economic model in which agents receive a number of draws from some distribution and we examine the behavior of the maximum in the limit as the number of draws becomes large. This paper asks: Do the average outcomes of such processes change when different agents receive a different number of draws? To answer this, we allow the number of draws an agent receives from the underlying distribution (e.g. of productivities, ideas, or utility shocks) to be given by a search technology, which reflects heterogeneity in the expected number of draws across different types of agents. We derive a new class of extreme value distributions that generalize the three standard distributions (Fréchet, Gumbel, Weibull) by incorporating heterogeneity across agent types. We generalize a result from Gabaix, Laibson, Li, Li, Resnick, and de Vries (2016) regarding extreme value outcomes and consider applications to aggregate productivity, markups, and social networks.