11. Calculating the price elasticity of supply Amy is a graduate student living in Miami who coaches youth soccer to supplement their normal income. At an hourly wage rate of $25, they are willing to coach 7 hours per week. Upping the wage to $45 per hour, they are willing to coach 11 hours per week. Using the midpoint method, the elasticity of Amy's labor supply between the wages of $25 and $45 per hour is approximately , which means that Amy's supply of labor over this wage range is