If an additional competitor reduces output per firm in a homogenous Cournot-oligopoly, market entry will be excessive …

evaluation is also justified in a Cournot-oligopoly with free but costly entry. If input markets are competitive and output per … firm declines with the number of firms (business stealing), there is excessive entry into such oligopoly. If trade unions …

In a Cournot-oligopoly with free but costly entry and business stealing, output per firm is too low and the number of … distortions occurring in oligopoly. Specifically, excessive entry is aggravated and the welfare loss due to market power rises. …