Which of the following events can cause the labor-supply curve to shift? a. a technological advance b. an increase in the price of output c. an increase in the wage rate d. an increase in the rate of immigration

The event "d. an increase in the rate of immigration" can change the labor supply curve.

Explanation: when the production price increases, the labor demand curve shifts to the right.

When a technological advance is incorporated according to the type of technology, the demand curve can shift to the left or right.

An increase in the salary rate would result in a change in the amount of work offered because the amount of work an individual offers depends on the salary rate.

An increase in the immigration rate shifts the labor supply curve because it would imply that the number of people willing to work increases.

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.