17. Do immigrants reduce the wage of native workers? Do immigrants "take jobs away" from native workers? 18. Describe the hiring decision of a perfectly discriminating monopsonist and of a nondiscriminating monopsonist. In what sense do monopsonists "exploit" workers? 19. Suppose there are two types of jobs in the labor market: "safe" jobs and "risky" jobs. Describe how the worker decides whether to accept a safe job (where she cannot be injured) or a risky job (where she will certainly be injured). 20. Describe how the firm decides whether to offer a safe working environment or a risky environment. 21. How is the market-compensating wage differential between safe jobs and risky jobs determined? Which type of job will offer a higher wage? 22. Describe how workers and firms "marry" each other in the labor market when there are many types of jobs offering various levels of risk to their workers. What does the slope of the hedonic wage function measure?