It’s worth noting that the second of those papers actually has recently been reanalyzed, and Cutler and Miller have now published a response to the reanalysis, as well. I think there is probably more work one could do on this (e.g., updating the difference-in-differences estimators in the original paper to reflect the current methodological state-of-the-art), but I also think it’s fair to say that the result has already been subjected to thorough and meaningful scrutiny.
It’s worth noting that the second of those papers actually has recently been reanalyzed, and Cutler and Miller have now published a response to the reanalysis, as well. I think there is probably more work one could do on this (e.g., updating the difference-in-differences estimators in the original paper to reflect the current methodological state-of-the-art), but I also think it’s fair to say that the result has already been subjected to thorough and meaningful scrutiny.