Do you have a source for the ride subsidization? My understanding is that for mature markets they're making a decent profit; their losses from subsidies are from new markets, or new initiatives in existing markets (Pool, Eats etc).

There have been a number of "Uber is cheaper than taxis because they are losing money" newspaper articles, but they usually point to the loss of the company as a whole.

I don't think there's clear metrics into market and price performance because they're still privately traded, and changing consistently.