Oligopoly and monopolistic competition and product differentiation

 

Unit 8 Assignment: Oligopoly and Monopolistic Competition and Product Differentiation

 

 

 

 

Problem

 

 

 

Dr. Fine and Dr. Feelgood are the only two medical doctors offering immediate walk-in medical services in the town of Springfield. That is, they operate in a duopoly. Each doctor can charge either a high price or a low price for a standard medical visit. The accompanying matrix shows their payoffs, in profits per patient (in dollars), for any choice that the two doctors can make.

 

(((PLEASE SEE ATTACHMENT WORD DOCUMENT WHICH SHOWS TABLE)))

 

1.    Suppose the two doctors play a one-shot game—that is, they interact only once and never again. What will be the Nash (non-cooperative) equilibrium in this one-shot game?

 

2.    Now suppose the two doctors play this game twice. Also, suppose each doctor can play one of two strategies: it can play either “always charge the low price” or “tit for tat”— that is, it starts off charging the high price in the first period, and then in the second period it does whatever the other doctor did in the previous period. Write down the payoffs to Dr. Fine from the following four possibilities:

 

 

 

a.    Dr. Fine plays “always charge the low price” when Dr. Feelgood also plays “always charge the low price.”

 

 

 

FIRST Period

Payoffs

SECOND Period

Payoffs

TOTAL Payoffs

 

Charges

(high or low)

 

Charges

(high or low)

Fine

 

 

Fine

 

 

 

Feelgood

 

 

Feelgood

 

 

 

 

 

 

 

 

b.   Dr. Fine plays “always charge the low price” when Dr. Feelgood plays “tit for tat.”

 

 

 

FIRST Period

Payoffs

SECOND Period

Payoffs

TOTAL Payoffs

 

Charges

(high or low)

 

Charges

(high or low)

Fine

 

 

Fine

 

 

 

Feelgood

 

 

Feelgood

 

 

 

 

 

 

 

 

c.    Dr. Fine plays “tit for tat” when Dr. Feelgood plays “always charge the low price.”

 

 

 

FIRST Period

Payoffs

SECOND Period

Payoffs

TOTAL Payoffs

 

Charges

(high or low)

 

Charges

(high or low)

Fine

 

 

Fine

 

 

 

Feelgood

 

 

Feelgood

 

 

 

 

 

 

 

 

d.    Dr. Fine plays “tit for tat” when Dr. Feelgood also plays “tit for tat.”

 

 

 

FIRST Period

Payoffs

SECOND Period

Payoffs

TOTAL Payoffs

 

Charges

(high or low)

 

Charges

(high or low)

Fine

 

 

Fine

 

 

 

Feelgood

 

 

Feelgood

 

 

 

 

 

 

 

 

  1. “In the long run, there is no difference between monopolistic competition and perfect competition.”

 

 

 

Discuss whether this statement is true, false or ambiguous with respect to each of the criteria listed under a, b, c, and d. Justify your answers.

 

 

 

a. The price charged to consumers

 

 

 

b. The average total cost of production

 

 

 

c. The efficiency of the market outcome

 

 

 

d. The typical firm’s profit in the long run

 

 

 

———————

 

References:

 

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