Publication details

An Explanation of the Inverted-U Relationship between Profitability and Innovation


KRČÁL Ondřej

Year of publication 2014
Type Monograph
Description In this book I introduce two models of innovation that explain the inverted-U relationship between profitability and innovation, and the findings of Aghion et al. (2005) and Hashmi (2005) related to the relationship between profitability and the dispersion of productivity in the industry. The basic model provides a simple and general explanation of the empirical findings. In the basic model firms choose R&D expenditures that maximize their expected profits under the assumption that R&D expenditures of firms might be constrained by the size of their profits. The prospect-theory model provides a more specific explanation of the empirical findings, which includes a behavioral model of managerial decision-making. Managers in the model choose R&D expenditures according to the preferences represented by the prospect-theory value function. For specific sets of parameter values, both models generate predictions that correspond to the empirical findings of Aghion et al. (2005) and Hashmi (2005). Finally, I show that both models generate realistic predictions for a wider range of parameter combinations around the specific parameter values.
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