Suppose that a new law requires every firm to provide its workers with free parking spaces. These spaces are worth $200 per year to workers, but cost firms $500 per year to provide. Show how this law affects the workers' labor supply curve, the firms' labor demand curve, and the market-clearing wage. Does the wage go up or down? Does it change by more or less than $200 per year? Does it change by more or less than $500 per year?