Carefully consider the following questions. Write down your answers (1 - 2 paragraphs) for question # 1 within a word document and submit your answers to your seminar leader. Be prepared to discuss all questions during the seminar section.

1. What is the difference between individual- and population-based studies? How is this reflected in the ecological study hypotheses?
2. Think of an exposure/disease relationship that you are interested in studying. Describe an individual-level study AND an ecological study that you could conduct to examine the associations between the exposure and the outcome. Specify hypotheses and design elements (individual and ecological).
3. What is meant by ecological fallacy? Give two examples.