Laura was in charge of purchasing food for the next book club meeting. She usually ordered sandwiches from the nearby deli, but the price of sandwiches had increased. One option for food was ordering pizza, which was $3 less than a sandwich. However, because the price of sandwiches had gone up, Laura could afford fewer sandwiches and pizza than previous meetings. The reduction in Laura's ability to purchase both sandwiches and pizza due to the increase of price in sandwiches is known in economic terms as . a budget constraint the substitution effect the income effect a change in income

Afirm wants to hire a project manager (pm) at a salary of $100,000. 30% of pms have high ability, and 70% of pms have low ability. high ability pms generate $120,000 in revenue and low ability pms generate $80,000 in revenue. in addition to differences in productivity, high and low ability pms have different outside offers. if a high ability pm is not hired by the firm, she can work for another company at a salary of $80,000. if the low ability pm is not hired by the firm, she can work for another company for $70,000. high ability pms are also able to get a project management professional (pmp) certification at a cost of $1,000. low ability pms are unable to get a pmp certification (they would fail the test). the firm is not able to observe a pm’s ability, but is able to observe and verify whether or not the pm has a pmp certificate.(a) draw the extensive form of the game.expert answer