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International Trade - Theory and Policy, 2010a

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2. The dem<strong>and</strong> assumption in which each consumer has a dem<strong>and</strong> for different sets of<br />

characteristics of a particular product type.<br />

3. This is a st<strong>and</strong>ard perfect competition assumption indicating what new firms do in response to<br />

positive profit in an industry.<br />

4. This is a st<strong>and</strong>ard perfect competition assumption indicating what existing firms do in<br />

response to negative profit in an industry.<br />

5. The production feature that is present when a firm’s average cost curve is downward sloping.<br />

6. Of many or few, this is the assumption made about the number of firms in a monopolistically<br />

competitive industry.<br />

7. The long-run value of firm profit in a monopolistically competitive industry.<br />

6.6 The Effects of <strong>Trade</strong> in a Monopolistically Competitive Industry<br />

LEARNING OBJECTIVES<br />

1. Use a monopoly diagram for a representative monopolistically competitive firm to<br />

depict a long-run equilibrium.<br />

2. Underst<strong>and</strong> how the market equilibrium changes upon opening to free trade.<br />

Assume that there are two countries, each with a monopolistically competitive industry producing a<br />

differentiated product. Suppose initially that the two countries are in autarky. For convenience, we will<br />

assume that the firms in the industry are symmetric relative to the other firms in the industry. Symmetry<br />

implies that each firm has the same average <strong>and</strong> marginal cost functions <strong>and</strong> that the dem<strong>and</strong> curves for<br />

every firm’s product are identical, although we still imagine that each firm produces a product that is<br />

differentiated from all others. (Note that the assumptions about symmetry are made merely for<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

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