Cournot described a market as 'the entire territory of which parts are so united by the relations of unrestricted commerce that prices there take the same level throughout, with ease and rapidity.' Which of the following violates an implicit assumption in the above definition?

MCQs on major topics and theories in the field of Industrial Organization. Topics include: Market structure analysis and the strategic behaviors of competing firms, including (but not limited to) product differentiation, collusion, price discrimination, pricing strategy, non-price discrimination (i.e. advertising), horizontal mergers, vertical integration, and vertical restraints.