This paper develops an econometric model of industry dynamics for concentrated markets that can be estimated very quickly from market-level panel data on the number of producers and consumers using a nested fixed-point algorithm. We show that the model has an essentially unique symmetric...

What determines structure and profitability across markets for goods and services? Understanding the relationship between market structure and performance is critical for determining effective economic policy governing anti-trust, intellectual property, industry regulation, and international...

We use a dynamic oligopoly model of entry and exit to evaluate how entry regulations affect profitability and market structure in retail. The model incorporates demand and store-level heterogeneity. Based on unique data for all retail food stores in Sweden, we find that the average entry costs...

This paper develops an econometric model of firm entry, competition, and exit in oligopolistic markets. The model has an essentially unique symmetric Markov-perfect equilibrium, which can be computed very quickly. We show that its primitives are identified from market-level data on the number of...

If an intermediary offers sellers a platform to reach consumers, he may face the following hold-up problem: sellers suspect the intermediary will enter their respective product market as a merchant after they have sunk fixed costs of entry. Therefore, fearing that their investments cannot be...