Q1. Total industry sales are $105million. The top four firms account for sales of $10 million, $9million, $8 million, and $5 million, respectively. What is the four-firm concentration ratio?
Q2. Using either a graph or table use two goods to construct a production possibilities curve. Clearly explain what a variety of different points on the curve mean. Illustrate what would make the curve expand or contract? Why is efficiency lost at the boundaries as when substantially more of one good and very little of another is produced?