what is difference in differences in stata regression what is difference in differences in stata why do you test for the difference in differences in stata regression difference in differences of stata difference between r1 and r2 regression what is significance r2 difference in differences statistic can you check the difference in differences of regression which of the following is a signficant regression type of statistic? cgtl. which statistic is signficant what is the significant relationship between an adj r2 and a precontrol difference in differences in stata difference in differences in stata how to test difference in differences in stata what is statistical difference in differences test difference between pre-treatment and post-control difference in differences stata which regression model uses r2 as an adj is the difference in differences between pre, control and post is difference-in-differences a signicant trait in stata