a). I want to Briefly discuss some reasons for why smaller class sizes would increase student achievement.Why is it difficult to uncover the causal effect of smaller class sizes using observational data?

b). Why might we measure a weak link between resources and student achievement using data from today?

c). In 1985, then-governor Lamar Alexander and the Tennessee legislature implemented the Project STAR experiment. a. What was the goal of this experiment? b. Describe the experimental design. c. Describe the findings. d. Discuss the threats to the experiment and how Krueger (1999) proposed to address each threat.

d). Sometimes economists use similar research methods but find different results. For example, when studying the effects of class size, Hoxby (2000) found evidence conflicting the findings of Project STAR. What could lead to the difference in findings? How can we reconcile her findings with those from Project STAR? What is the implication of the difference between these studies for using the Project STAR results to support lower class mandates-------I can't find research answer

e). Imagine that you are a principal of a school and want to use value-added information to hire teachers. Are there observable characteristics of teachers that predict high value-added? How might you use the results from value-added studies to hire the most effective teachers, or is it not possible to use them for this purpose? Can you think of any potential limitations to the use of value-added measures in schools