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In the absence of money, Ralph uses his supply of coal as means to obtain other

ID: 1225412 • Letter: I

Question

In the absence of money, Ralph uses his supply of coal as means to obtain other items. At the beginning of winter, Ralph estimates he has a surplus of coal and trades it at a rate of 2lbs of coal for each 1/2 pound of coffee he needs.

The winter is colder than anticipated, and as his excess coal supply dwindles, he is only willing to give up 1 lb of coal for 1/2 pound of coffee. This is an example of:

Multiple Choice

a)The diminishing rate of marginal substitution.

b) the law of demand

c) a decrease in supply

d) an increase in supply

a)The diminishing rate of marginal substitution.

b) the law of demand

c) a decrease in supply

d) an increase in supply

Explanation / Answer

a) The diminishing rate of marginal substitution.

(The marginal rate of substitution is the rate at which a consumer is ready to give up one good in exchange for another while maintaining the same level of utility. In this case it decreases from 4 (2/0.5) to 2 (1/0.5).

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