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Help I don't understand this chart. I don't know how to get pi or understand how to read it.?

Microeconomics Homework Nine

1. Chapter 10 ? Monopoly. The following table presents cost and

demand data for Joe?s note taking service. Joe takes notes for

students who want to skip class, and he is the only person at this

University who offers such a service, so he has a monopoly (I am

implicitly assuming that actually going to class is not a close

substitute). Q is the quantity of hours Joe spends taking notes, and the

P is the hourly price he charges. Assume (for parts a-c) that Joe is a

single price monopolist ? he charges all his customers the same price.

Q

0

1

2

3

4

5 P

11

10

9

8

7

6 TR MR

----- TC

4

10

14

20

27

37 MC

----- ----- a. (6 points) What is Joe?s profit maximizing price and quantity? What

is his maximum profit?

b. (4 points) Is Joe in long-run equilibrium? Briefly explain your

d. (6 points) If Joe could perfectly price discriminate ? if he knew

every customer?s demand curve ? what price would he charge for

the first hour of note taking? What price would he charge for the

second? How many hours would he spend taking notes?

e. (4 points) Assume again that Joe is a perfect price discriminator

and that he chooses the price and quantity to maximize profit ? is

2. (8 points) In the example above showing Joe?s profit maximizing

output decision, you should have found that Joe sets his price above

marginal cost (P &gt; MC). We call this the monopoly mark-up. Can you think of a special case where Joe, despite being a monopoly, would

find it profit maximizing to set P = MC? Assume that Joe cannot price

makes Joe?s case different from a perfectly competitive firm). In

general, what will determine the magnitude of the monopoly mark-up

(another hint: is it better to have a monopoly over bubble gum or

water)?

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