Most analysis of market power assumes that managers are perfect agents for shareholders. This paper relaxes that assumption. When managers of a multi-product firm exert unobservable effort to improve product quality, there is a trade-off between providing adequate effort incentives and ensuring...

Critical loss analysis is often used to argue that firms with large margins have more to lose from a reduction in sales and hence are less likely to increase prices. This argument ignores the fact that profit-maximizing competitors who do not coordinate their pricing only have large margins if...

Most analysis of market power assumes that managers are perfect agents for shareholders. This paper relaxes that assumption. When managers of a multiproduct firm exert unobservable effort to improve product quality, price coordination incentives tradeoff with effort incentives. This makes some...