Final answer:
In a Cobb-Douglas production function, an increase in the population of workers without a high school degree (L1) leads to a decrease in relative wages. The exact decrease depends on the share of L1 workers in the production function (α).
Step-by-step explanation:
In a Cobb-Douglas production function, the relative wages decrease when there is an increase in the population of workers without a high school degree (L1). The decrease in relative wages is determined by the ratio of the increase in the population of L1 workers to the population of workers with a high school degree (L2). In this case, the increase in L1 workers is 12%.
Using the formula for the Cobb-Douglas production function, the decrease in relative wages can be calculated as:
Relative Wage Decrease = (L1/L2) * (1 - α)
Where α is the share of L1 workers in the production function (0 < α < 1).
Since the percentage increase in L1/L2 is 12%, the relative wages would decrease by 12 * (1 - α) percentage points. However, the value of α is not provided in the question, so the exact decrease in relative wages cannot be determined without additional information.