Problem
You are an economist who wants to know how risk of on-the-job injury affects peoples' wages. Studying construction workers (who have a substantial risk exposure), you discover that they earn very little more than otherwise similar people with equivalent skills and training in low-risk jobs. You conclude that people only require a small wage premium to induce them into risky lines of work. How does selection bias make your conclusion doubtful?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.