Solutions Manual, Pricing Appendix 19
Problem A-7 (continued)
3. The price elasticity of demand, as defined in the text, is computed as
follows:
d =
ln(1 + % change in quantity sold)
ln(1 + % change in price)
=
=
=
= -1.500
The profit-maximizing price can be estimated using the following formu-
la from the text:
Profit-maximizing price =
d
d
εVariable cost per unit
1+ε
æö
÷
ç÷
ç÷
ç÷
ç
èø
=
-1.5 $6.00
1+(-1.5)
æö
÷
ç÷
ç÷
÷
ç
ç
èø
= 3.00 × $6.00 = $18.00
Note that this answer is consistent with the plot of the data in part (2)
above. The formula for the profit-maximizing price works in this case
because the demand is characterized by constant price elasticity. Every
5% decrease in price results in an 8% increase in unit sales.