1. Economics 1629 LECTURE 17: Instrumental Variables II
Daniel Björkegren

2. How does class size affect achievement? (Angrist and Lavy 1999)

3. Total Students
Number of Classes
Average Students per Class 20 40 41 60 80
100

8. Heart attack treatment
survival = 0 + 1 intens_treatment + 2female + 3black +4urban + u
where:
survival: dummy variable indicating whether the patient survived for at least one year after the heart attack (yes=1)
intens_treatment: dummy variable indicating whether the patient had received intensive treatment (defined as cardiac catheterization) after experiencing heart attack (yes=1)
female: dummy variable indicating whether individual is a female
black: dummy variable indicating whether individual is African American
urban: dummy variable indicating whether individual lives in an urban area

10. How do police affect crime? (Levitt 1997)

16. “crime is a critical political issue” “a city’s economic performance is largely outside the control of the mayor”

18. For Wednesday:
Why are some countries rich and others poor? Why do nations fail? Read: Acemoglu, Johnson and Robinson 2001: The Colonial Origins of Comparative Development Send 3 discussion points to: