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# Answer to Question #70463 in Microeconomics for Ariba

Question #70463
The Eastern Shuttle, Inc., is a regional airline providing shuttle service between New York and
Washington, DC. An analysis of the monthly demand for service has revealed the following
demand relation:
Q = 26,000 – 500P – 250POG + 200IB – 5,000S
Where: Q is quantity measured by the number of passengers per month, P is price (\$), POG is
a regional price index for other consumer goods (1967 = 1.00), IB is an index of business activity,
and S, a binary or dummy variable, equals 1 in summer months and 0 otherwise.
A. Determine the demand curve facing the airline during the winter month of January if POG
= 4 and IB = 250.
B. Determine the demand curve facing the airline, quantity demanded, and total revenues
during the summer month of July if P = \$100 and all other price-related and business
activity variables are as specified previously
Expert's answer
In case A the demand curve has the form of equation:
Q = 26,000 – 500P – 250*4 + 200*250 – 5,000*0
Q = 75,000 – 500P

In case B the demand curve has the form of equation:
Q = 26,000 – 500P – 250*4 + 200*250 – 5,000*1
Q = 70,000 – 500P

Total revenues during the summer month of July if P = \$100:
Q = 70,000 – 500*100 = 20 000
TR = Q*P = 20 000*100 = 2 000 000 USD

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