2. T shirtsChangeShoesChange cost of shoes 200 18-211 2/1 shirts 15-321 3/1 shirts 11-431 4/1 shirts 6-541 5/1 shirts 0-651 6/1 shirts

3. MARGINAL COST The opportunity cost of one more unit of a good That is, what you must give up to gain one more unit of something To gain the fourth shoe you must give up five shirts. When shoe production is at 4 units, the marginal cost of a shoe is five shirts.

5. Marginal Benefit Preferences and Marginal Benefit –Preferences are a description of a person’s likes and dislikes. –To describe preferences, economists use the concepts of marginal benefit and the marginal benefit curve. –The marginal benefit of a good or service is the benefit received from consuming one more unit of it. –We measure marginal benefit by the amount that a person is willing to pay for an additional unit of a good or service. 2-5

6. MARGINAL BENEFIT –Generally, the more we have of any good or service, the smaller its marginal benefit and the less we are willing to pay for an additional unit of it. –We call this general principle the principle of decreasing marginal benefit. –The marginal benefit curve shows the relationship between the marginal benefit of a good and the quantity of that good consumed. 2-6

7. Shoes Cost in shirts Shirts willing to give up MCMB 128 236 344 452 560

9. Using Resources Efficiently Efficient Use of Resources –When we cannot produce more of any one good without giving up some other good, we have achieved production efficiency, and we are producing at a point on the PPF. –When we cannot produce more of any one good without giving up some other good that we value more highly, we have achieved allocative efficiency, and we are producing at the point on the PPF that we prefer above all other points. 2-9