Simple supply and demand model

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Assume the following simple supply and demand model:

Qd = a - bP + cY + dPr

Qs = eP - fw   where a,b,c,d,e,f all strictly positive and Pr is the price of a related good, P is the price of the good, Y is consumer income, and w is the wage rate.

Assume a supply and demand diagram with P measured on the vertical axis and Qd and Qs measured on the horizontal axis.

The sign of the derivative of Qd with respect to Pr suggests which of the following?

Select one:

a. The related good is a substitute

b. the related good is a complement

c. the related good is inferior

d. the related good is normal

e. none of the above

Reference no: EM131160650

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