With the new estat parallel command, you can easily test the proportional odds (parallel lines) assumption for ordered logit models. This feature is a part of StataNow™.
The proportional odds model (ordered logit model) fit by ologit employs the proportional odds assumption, also called the parallel lines assumption, which states that the cumulative probability curves for each outcome category plotted against a predictor should be parallel. This assumption allows the effect of each predictor variable to be expressed as a single coefficient. Stata’s new estat parallel command tests the proportional odds assumption after fitting a model with ologit.