Suppose all firms in a given industry have the same supply curve given by S i (p) = p/3. Plot and label the four industry supply curves generated by these firms if there are 1, 2, 3, or 4 firms operating in the industry.

Leticia has worked for 20 years in the public relations department of a large firm and has been the vice-president for the past ten years. it is unlikely she will ever be promoted to the top executive position in her firm even though she has directed several successful projects and is quite capable. her lack of promotion is an illustration of (a) the "glass ceiling" (b) the "glass elevator" (c) the "mommy track" (d) sexual harassment