Suppose that Emily’s preferences over baskets containing petrol (good x), and food (good y), are described by the utility function U (x, y) = xy + 100y. The marginal utilities for this function are,
MUx =y and MUy =x+100.
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Write My Essay For MeUse Px to represent the price of petrol, Py to represent the price of food, and I to represent Emily’s income.
Question 1: Find Emily’s petrol demand function, and Sally’s food demand function.
Question 2: From Emily’s perspective, is food a normal good, an inferior good, or neither normal nor inferior? Briefly explain with reference to your answer to question 1.
Question 3: Suppose that the price of petrol is $2 per litre, the price of food is $5 per kilogram, and Emily’s income is $400. What quantities of food and petrol does Emily consume? What level of utility does Emily receive from this consumption basket?
Question 4: Suppose that, as in question 3, the price of petrol is $2 per litre, the price of food is $5 per kilogram, and Emily’s income is $400. Now suppose that the government is considering two alternative policies to improve Emily’s welfare.
Policy 1: Place a $0.4 per litre subsidy on petrol, reducing the price of petrol to $1.6 per litre.
Policy 2: Give Emily a voucher that can be used to purchase food (but not petrol). What value of voucher will cause policy 2 to have the same effect on Emily’s utility as policy 1?
Question 5: Which of the two policies, described in question 4, is least costly to the government? (Assume that the value of the voucher in Policy 2 is your answer to question 4.) Briefly explain why this is the case.
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