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price-discriminating monopolist

I can't figure out how to go about finding how much the firm will charge.

Suppose that a price-discriminating monopolist has segregated its market into two groups of buyers, the first group of described by the demand and revenue data in table 1. The demand and revenue data for the second group of buyers is in table 2. Assume that MC is $13 in both markets and MC = ATC at all output levels. What price will the firm charge in each market? Based solely on these two prices, what can you conclude about the relative elasticties of demand in the two markets? What will be this monopolist's total economic profit?
Table 1

Price Quantity
demanded Total
revenue Marginal revenue

$115 0 $0
100 1 $100 $100
83 2 $166 $66
71 3 $213 $47
63 4 $252 $39
55 5 $275 $23
48 6 $288 $13
42 7 $294 $6
37 8 $296 $2
33 9 $297 $1
29 10 $290 $7

Table 2

Price Quantity
demanded Total
revenue Marginal revenue
$71 0 $0
63 1 $63 $663
55 2 $110 $47
48 3 $144 $34
42 4 $168 $24
37 5 $185 $17
33 6 $198 $13
29 7 $203 $5

Solution Preview

The firm will charge prices where MR is greater than or equal to MC

From the ...

$2.19