What has been ignored in much of the existing studies of oligopoly power is that market behaviour need not be static in nature, and oligopoly power in agriculture need not be present in every month of the year. In a market which is characterized by seasonality and supplied by different sources...

Empirical applications of testing oligopoly power in different industries are based on the 'new empirical industrial organization' (NEIO) approach. Parallel to this approach, theoretical and empirical applications to testing oligopoly power in international trade have also emerged. A shortcoming...