Describe what assumptions are necessary to use a regression discontinuity approach. 1b. What does research conclude about the important inputs of education production? 1c. Explain what peer effects are and provide an example of both a positive and a negative peer effect. 1d. Explain the difference between correlational evidence vs. causal evidence. Discuss why finding causal evidence for topics in economics of education is difficult. 1e. When does the racial achievement gap show up in testing? What are reasons that explain this gap? What are ways we could close this gap using education? 1f. What does the evidence conclude about vouchers and school choice? What are reasons that school vouchers might not work in the way economic models predict?