Search Results

You are looking at 1 - 1 of 1 items for :

  • "instrumental variable" x
  • By Author: Cahill, Kevin S. x
Clear All
Restricted access

John H. Sampson, James E. Herndon II, Allan H. Friedman and Amy P. Abernethy

biases inherent in observational studies is a method frequently used in economic analysis: instrumental variable analysis. This analytic technique involves two regression models. The first model predicts treatment assignment as a function of instrumental variables, where an instrumental variable is defined as a variable that affects outcome only through its effect on treatment assignment and does not have an effect on outcome. The second model examines the effect of treatment on outcome. Theoretically the effect of selection bias derived from an instrument variable is