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1) Choose whether this statement is true or false and explain please a. In a two-good...

1) Choose whether this statement is true or false and explain please

a. In a two-good world if one good is an inferior good the other good must be a luxury.

b. When the price of a good changes, the substitution effect can be found by comparing the equilibrium quantities purchased on the new budget line and a hypothetical budget line that is a shift back to the original indifference curve parallel to the new budget line.

c. A Giffen good must be an inferior good and all inferior goods are Giffen goods.

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Answer #1

a) True

For an inferior good, if price decreases, its demand will increase.
Suppose that both goods are inferior. So, if the price of both decreases, both of their sales increases, which is not possible.

Thus, if one good is inferior, the other must be a luxury.


b) False

When the price of a good changes, the substitution effect can be found by comparing the equilibrium quantities purchased on the original indifference curve when faced with the original  prices and when faced with new prices.

c) False

The inverse is true. That is, all giffen goods are inferior but all inferior goods are not giffen.

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