Calculating the price elasticity of supply Antonio is a retired teacher who lives in Chicago and teaches tennis lessons for extra cash. At a wage of $30 per hour, he is willing to teach 6 hours per week. At $50 per hour, he is willing to teach 16 hours per week. Using the midpoint method, the elasticity of Antonio’s labor supply between the wages of $30 and $50 per hour is approximately , which means that Antonio’s supply of labor over this wage range is