1. E

    Difference in Difference-SPSS: Creating dummy variable

    I am doing a program evaluation and want to use difference in difference analysis. I calculated the difference in difference by hand and now want to perform a regression. I have made a dummy for 1=treatment and 0=no treatment. But since I have done my pre and post test on the same...
  2. E

    Difference-in-difference regression

    Hello, I have a problem with my current research project and I am not very experienced with statistics so it would be great to find some help here! I have performance data of companies which can be categorized into two different groups (state-owned, not state-owned). Now I would like to...