Lumpy investment, productivity and quantitative models
Abstract
Firms play a pivotal role in the real economy and are a fundamental part of Economics. The reliability of the findings of economic models depends on how well their assumptions capture the true nature of firms. Moreover, in light of the growing significance of microfoundations in Macroeconomics, it becomes necessary to keep expanding our understanding of the complexities of firm dynamics and sources of heterogeneity, which can influence aggregate trends and behaviors. Therefore, it is imperative that researchers constantly examine the fundamental patterns related to firms and adapt their model hypotheses accordingly. Currently, it is standard practice to assume that productivity is a process completely exogenous to the firm. However, the existing literature on lumpy investment has demonstrated that large spikes of investment in physical capital are often accompanied by disruptions in productivity. This thesis is concerned with this inconsistency between these findings and common practic ...
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