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Cloth (<strong>millions</strong> of meters per bottle)<br />

5<br />

4<br />

3<br />

2<br />

1<br />

a<br />

Marginal Benefit<br />

b<br />

c<br />

Decreasing<br />

marginal benefit<br />

from wine<br />

0 1 2 3 4 5<br />

*<br />

wine (<strong>millions</strong> of bottles)<br />

Université d’Ottawa / University of Ottawa<br />

Université d’Ottawa / University of Ottawa<br />

d<br />

e<br />

MB<br />

*<br />

Efficient use of resources<br />

Resource use is efficient when we produce the<br />

goods and services that we value most highly.<br />

• When resources are used efficiently<br />

‣ if we produce any more of one good, we give up<br />

something that we value even more highly<br />

‣ To find optimality decision, we compare the<br />

marginal cost to the marginal benefit.<br />

Université d’Ottawa / University of Ottawa<br />

Université d’Ottawa / University of Ottawa<br />

Efficient Use of Resources<br />

• If the marginal benefit of the last unit of a good<br />

exceeds its marginal cost, we increase production<br />

of that good.<br />

‣ MB > MC; increase<br />

• If the marginal cost of the last unit of a good<br />

exceeds its marginal benefit, we decrease<br />

production of that good.<br />

‣ MB < MC; decrease<br />

*<br />

Marginal cost and willingness to pay<br />

(meters of cloth per bottle)<br />

5<br />

4<br />

3<br />

2<br />

1<br />

Efficient Use of Resources<br />

Benefit<br />

exceeds<br />

cost<br />

Bottles of pop<br />

that people are<br />

willing to forgo<br />

Bottles of pop<br />

that people<br />

must forgo<br />

Cost<br />

exceeds<br />

benefit<br />

0 1.5 2.5 3.5 5<br />

*<br />

MB<br />

MC<br />

wine (<strong>millions</strong>)<br />

Université d’Ottawa / University of Ottawa<br />

Université d’Ottawa / University of Ottawa<br />

Université d’Ottawa / University of Ottawa<br />

Université d’Ottawa / University of Ottawa<br />

Specialization and trade expand<br />

production possibilities<br />

There are gains from trade<br />

Comparative advantage is the ability to perform<br />

an activity at a lower opportunity cost than<br />

anyone else.<br />

Comparative Advantage<br />

• Differences in comparative advantage give<br />

rise to gains in trade.<br />

• Suppose that CDs have two components: a<br />

disc and a plastic case.<br />

• Tom and Trish both own factories.<br />

‣ They can each produce both discs and cases, or<br />

they can specialize.<br />

‣ What should they do?<br />

*<br />

Université d’Ottawa / University of Ottawa<br />

Université d’Ottawa / University of Ottawa<br />

*<br />

Université d’Ottawa / University of Ottawa<br />

Université d’Ottawa / University of Ottawa

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