Which of the following events would cause the short-run aggregate supply curve to shift? Instructions: You may select more than one answer. Click the box with a check mark for correct answers and click to empty the box for the wrong answers. The price level increases unexpectedly. unanswered Consumers become more pessimistic about the economy. unanswered During an economic boom, Congress passes a guest worker law that enables up to 5 million foreign workers to get work permits in the United States. unanswered Manufacturing firms expect steel prices to decrease significantly. unanswered The Affordable Care Act is amended to require employers to provide health insurance to part-time as well as full-time employees.