Questions on Thornton (2008)
For this question, you need to use the variable HIV_04, which equals zero if the test indicated the person was HIV negative (HIV-) and equals one if the test indicated the person was HIV positive (HIV+). Within each of these subgroups, you can estimate a CATE: the average treatment effect of receiving an incentive (any) on getting the test result (got), conditional on the person being HIV- or HIV+. You can estimate these two CATEs by calculating a simple difference-in-means in getting the test result (got = 1 vs got = 0).
3a. What is the CATE for HIV+ individuals ?
3b. What is the CATE for HIV- individuals ?