Consider a government that raises money in a two-good economy by taxing good 1 at a rate of t per unit. The government is considering replacing these taxes with a lump-sum tax to the consumer that raises the same revenue. Thus, if the consumer consumes x units of good 1 before the change in taxes, she must pay the government a lump sum of tx after the change. Suppose, moreover, that prices change only by the amount of the tax; i.e., if prices are (p₁ +t, p2) before the change, then they become (P₁, P2) after. Let x = (x₁, x₂) be the consumer's demand before the change, and x' = (x₁, x2) the consumer's demand after. Suppose that x‡ x'.

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Chapter6: Supply, Demand And Government Policies
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. Consider a government that raises money in a two-good economy by taxing good 1 at a rate
of t per unit. The government is considering replacing these taxes with a lump-sum tax
to the consumer that raises the same revenue. Thus, if the consumer consumes x units of
good 1 before the change in taxes, she must pay the government a lump sum of tx after
the change. Suppose, moreover, that prices change only by the amount of the tax; i.e., if
prices are (p₁ + t, p2) before the change, then they become (P₁, P2) after. Let x = (x1, x2) be
the consumer's demand before the change, and x' (x1, x2) the consumer's demand after.
Suppose that x = x'.
=
(a) Is one of x or x' revealed preferred to the other (and if so, which)?
Solution: The budget constraint before the change is (p₁+t)ã₁+p2ã2 ≤w and after the
change is p₁₁ +p2x2 ≤ w − tx₁. Since x = (x1, x2) satisfies the first budget constraint,
it must also satisfy the second one. Hence x is affordable after the change when x' is
chosen. Therefore, x' is revealed preferred to x. Depending on the choices, x may or
may not be revealed preferred to x'; it is impossible to determine.
Transcribed Image Text:. Consider a government that raises money in a two-good economy by taxing good 1 at a rate of t per unit. The government is considering replacing these taxes with a lump-sum tax to the consumer that raises the same revenue. Thus, if the consumer consumes x units of good 1 before the change in taxes, she must pay the government a lump sum of tx after the change. Suppose, moreover, that prices change only by the amount of the tax; i.e., if prices are (p₁ + t, p2) before the change, then they become (P₁, P2) after. Let x = (x1, x2) be the consumer's demand before the change, and x' (x1, x2) the consumer's demand after. Suppose that x = x'. = (a) Is one of x or x' revealed preferred to the other (and if so, which)? Solution: The budget constraint before the change is (p₁+t)ã₁+p2ã2 ≤w and after the change is p₁₁ +p2x2 ≤ w − tx₁. Since x = (x1, x2) satisfies the first budget constraint, it must also satisfy the second one. Hence x is affordable after the change when x' is chosen. Therefore, x' is revealed preferred to x. Depending on the choices, x may or may not be revealed preferred to x'; it is impossible to determine.
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