All of the following would tend to increase a worker's wage except a. more education b. having a greater amount of natural ability c. working harder d. doing a job that is fun e. working the night shift

1. **More education:** Increased education typically leads to greater skills and qualifications, which can justify higher wages. 2. **Greater natural ability:** Having more natural ability can make a worker more productive and valuable, often resulting in higher wages. 3. **Working harder:** While the effect of effort may be less direct, working harder can lead to better performance, promotions, or wage increases. 4. **Doing a job that is fun:** A job being enjoyable does not necessarily correlate with higher wages. Often, jobs that are considered fun may not pay as much as jobs that require more demanding skills or responsibilities. 5. **Working the night shift:** Night shifts often come with a premium (shift differential), which increases wages. Thus, the factor that would tend to *not* increase a worker's wage is \( \textbf{d. doing a job that is fun.} \)