This paper presents a firm and market model that is able to reproduce the empirically observed patterns on firm growth and its statistical characteristics. It goes beyond the existing firm models by reproducing all stylized facts established in the literature. Furthermore, the model is flexible...

This paper uses newly available firm-level tax data to evaluate the market structure in South African manufacturing sectors in the period 2010-12. To describe the market structure we compute markups for South African manufacturing firms and concentration indexes for 4-digit manufacturing...

We develop a model of a city populated by heterogeneous agents. Agents self-select into entrepreneurship, and entrepreneurs set up firms which hire workers. We characterize the equilibrium matching between firms and workers, as well as the within-city assignment of agents to locations. We then...

This paper evaluates four publicly discussed policy options to mitigate market power in the German wholesale electricity market. These four options are: a regulatory solution favoured by the Federal Ministry for Economics and Technology, the implementation of a day-ahead flow-based market...

Based on an analysis of cartel prosecutions since 2007, this article assesses the way the European Commission has built up its fines in practice. The fines are compared with those imposed by the European Commission over the period from 1999 to 2006. The main findings are that, while fines have...

We show that statistical tests of OPEC behavior have very low power across a wide range of alternative hypotheses regarding market structure. Consequently, it is difficult, given the current availability and precision of data on demand and costs, to distinguish collusive from competitive...

This paper studies the importance of firm-level price markup dynamics for business cycle fluctuations. Using state-of-the-art IO techniques to measure the behavior of markups over the business cycle at the firm level, I find that markups are countercyclical with an average elasticity of -1.1...

This paper studies the importance of firm-level price markup dynamics for business cycle fluctuations. Using state-of-the-art IO techniques to measure the behavior of markups over the business cycle at the firm level, I find that markups are countercyclical with an average elasticity of -1.1...

Generic drugs play an important role in disciplining drug prices and controlling rising drug costs. However, the effect that an additional generic drug competitor has on drug prices is difficult to measure because the number of firms competing in a market is endogenously determined. We identify...

We study changes in markups across 72 product markets from 2006 to 2018. A growing literature has documented a rise in markups over time using a production function approach; we instead employ the standard microeconomic method, which is to estimate demand and then invert firms' first-order...