Agreed with this. Click here
Towards the Unification of External and Internal Validity: An Empirical Approach
We evaluate the role of selection bias in causal generalization. We compare levels of bias in estimates of average causal impacts from experiments and from non-experiments. To demonstrate we use data from 79 sites in the multisite trial of Tennessee's Student Teacher Achievement Ratio (STAR), and we use results obtained during a randomized experiment of the Alabama Math Science and Technology Initiaitve (AMSTI).
Declaration of conflicts of interestNone
Corresponding author firstname.lastname@example.org
Lead author country
- United States
Lead author job role
- Independent researcher
Lead author institutionEmpirical Education Inc.
Ethics statementThe work makes use of data from two experiments. The experiments complied with relevant ethical standards for human subjects protections.
- Yes, I agree to Advance terms