9/23 Staples/Office Depot
S5. Instrumental Variables
What if unobserved characteristics of the city change over time.
What if # OSS is determined by unobserved characteristics.
Expansion of Walmart (http://projects.flowingdata.com/walmart/)
S5. Instrumental Variables
What if unobserved characteristics of the city change over time.
What if # OSS is determined by unobserved characteristics.
Expansion of Walmart (http://projects.flowingdata.com/walmart/)