Negative control variables are sometimes used in non-experimental studie...
Difference-in-differences is without a doubt the most widely used method...
We consider studies where multiple measures on an outcome variable are
c...
In this paper, we generalize methods in the Difference in Differences (D...
Many proposals for the identification of causal effects in the presence ...
We consider the task of identifying and estimating the causal effect of ...
Objective: Recently Doi et al. argued that risk ratios should be replace...