We examine the consumer welfare effect of a firm's partial ownership of a competitor and compare the implications of alternative forms of divestiture. We identify conditions under which turning voting shares into non-voting shares is preferable to selling the shares to the firm's current...

I argue that dynamic oligopoly models are an area of industrial organization where much work needs to be done and much work can be done. In some particular settings (e.g., network industries), dynamic oligopoly models provide sensible answers when static models fall short of doing so.