You know, we have a few confounding variables and a clear effect. Where does your certainty that it's price, and not another variable that it comes from?

(Yes, I acknowledge you have a problem with the predatory pricing. I understand you. Was it not against taxis, I'd have a problem too, it's just that I hate taxis more than I hate powerful companies messing with small people. Yet, that does not make it any clear that the change is mostly due to prices.)