# tax revenue

Problems attached. No graphs required, simple computations only.

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#### Solution Preview

1. UA = 5 + Sqrt(MA)

UB = Sqrt(MB)

MA + MB = 25

If the society has utilitarian social welfare functional then total utility is given by

SWF = UA + UB = 5 + Sqrt(MA) + Sqrt(MB)

(a)

(i) MA = 16 and MB = 9

Then SWF = 5 + Sqrt(16) + Sqrt(9) = 5 + 4 + 3 = 12

(ii) MA = 9 and MB = 16

Then SWF = 5 + Sqrt(9) + Sqrt(16) = 5 + 3 + 4 = 12

(b) To solve what distribution maximizes social welfare we have to consider the case where the marginal utility per dollar is the same. This condition maximizes total utility.

MU_x/P_x = MU_y/P_y

Since we do not have prices here, we just consider the case where the marginal utilities are the same. The marginal utility for A is 0.5 Sqrt(MA) and that of B is 0.5 Sqrt (MB). Utility is maximized when

0.5 Sqrt(MA) = 0.5 Sqrt (MB)

This is possible when MA = MB = 0 or MA = MB.

SWF = 5 + Sqrt(12.5) + Sqrt(12.5) = 12.071 > 12 as we obtained ...

#### Solution Summary

Calculate the tax revenue generated for the government and tax burden for the buyers and sellers.