An increase in the market price of​ men's haircuts, from ​$18 per haircut to ​$28 per​ haircut, initially causes a local barbershop to have its employees work overtime to increase the number of daily haircuts provided from 35 to 40. When the ​$28 market price remains unchanged for several weeks and all other things remain equal as​ well, the barbershop hires additional employees and provides 55 haircuts per day.