ParallelTrendVergleich
ParallelTrendVergleich is a methodological concept used in causal inference to assess the plausibility of the parallel trends assumption in quasi-experimental designs, particularly difference-in-differences analyses. The core idea is that, in the absence of treatment, the treated and control groups would have followed similar trajectories over time.
Methods for conducting a ParallelTrendVergleich include both graphical and statistical checks. Graphical checks involve plotting mean
Interpretation of the results hinges on evidence of parallel pre-treatment trends. If pre-treatment interaction terms are
Limitations include sensitivity to the length of the pre-treatment period, potential non-stationarity, autocorrelation, measurement error, and