Suchergebnisse

An important question in horizontal merger analysis is what share of a firm's lost output from a unilateral price increase will divert to its merger partner. This 'diversion ratio' is often estimated using data on customer switching from a firm to its rivals ('churn'). We use a tractable oligopoly model to investigate the potential biases of such estimates, depending on what caused the churn: shifts in quality or marginal cost of the firm or of a rival; or demand‐side shifts due to changed circumstances or learning about product attributes. With demand‐side shifts, churn can be greater between more distant competitors.

This article analyzes the welfare effects of monopoly differential pricing in the important, but largely neglected, case where costs of service differ across consumer groups. Cost‐based differential pricing is shown to increase total welfare and consumer welfare relative to uniform pricing for broad classes of demand functions, even when total output falls or the output allocation between consumers worsens. We discuss why cost‐based differential pricing tends to be more beneficial for consumers than its demand‐based counterpart, third‐degree price discrimination. We also provide sufficient conditions for welfare‐improving differential pricing when costs and demands differ across consumer groups.

AbstractWe analyze welfare under differential versus uniform pricing across oligopoly markets that differ in costs of service, and establish general demand conditions for differential pricing by symmetric firms to increase consumer surplus, profit, and total welfare. The analysis reveals why competitive differential pricing is generally beneficial—more than price discrimination—but not always, including why profit may fall, unlike for monopoly. The presence of more competitors tends to enlarge consumers' share of the gain from differential pricing, though profits often still rise. When firms have asymmetric costs, however, profit or consumer surplus can fall even with 'simple' linear demands.