Which of the following is NOT an example of moral hazard?
1) People who engage in high-risk hobbies with high accident rates prefer health insurance plans with low deductibles.
2) Loggers clear-cut a tract of land when paying a fixed price rather than when paying per tree felled.
3) Drivers of heavier, safer cars are more likely to run stop signs.
4) Workers on commission work harder than those paid an hourly wage.
5) Students tend to study less for quizzes when they know the professor gives a lot of extra credit.