4. A conceptual difference between a firm operating in a perfectly competitive market and a firm operating in a monopolistically competitive market is that: a) In the long run, the firm operating in a perfectly competitive market makes smaller profits than the firm operating in a monopolistically competitive one. b) If economic profits are being made, the firm in the perfectly competitive market will face entry of new firms whereas the firm in the monopolistically competitive one will not. c) None of the other answers. d) The firm in the perfectly competitive market faces a horizontal demand curve, whereas the firm in the monopolistically competitive market faces a downward sloping demand curve. e) In the long run equilibrium, the firm in the perfectly competitive market is onerating where

3. Assume that a profit-maximizing firm in a monopolistically competitive industry is in long-run equilibrium. (a) Draw a correctly labeled graph that shows the profit-maximizing firm's price and output. (b) Assume that the city in which this industry operates eliminates the business license fee (a fixed cost) for all firms in this industry. How does the elimination of the license fee affect each of the following for the individual firm in the short run? Explain your answers. (i) Output (ii) Economic profits

If Amazon sells dozens of similar types of pencils at slightly different prices, we might assume the pencil market is _________. Select one: a. an oligopoly. b. a monopolistically competitive market. c. a monopoly. d. a perfectly competitive market.

1. Suppose we live in a world where the widgets market is a monopolistically competitive market with homogenous firms (i.e. no productivity differences among firms). There are two countries: A and B. In each country, consumer demand for widgets can be written as Q = S x- x (P – P), 30 where n is the number of widget firms, P the price of widget charged by the firm, and P the average price of widget by other firms in the market. Moreover, widget firms in both countries have the same total cost function, which is C = 750 + (5 × Q). It is also given that marginal revenue of each 30Q firm can be written as MR = P – Total demand for widget in country A is SA = 900 and Sg = 1600 in country В. a) Derive the average cost function from the total cost function. What is the marginal cost? b) Calculate the number of firms and the prices of widget in each country when trade is not allowed (that is, calculate na, ng, Pa, PBÌ- c) Calculate the number of firms and the price of widget in the unified…