Couldn’t we just take taxi prices in the developing world as a proxy for Robo-taxi costs? The cars are more expensive (higher taxes), gas is more costly, but driver salaries and maintenance costs are cheaper. Then say an 80-100 RMB one way commute cost sounds more reasonable for Robo taxis (so let’s say 200 RMB/day = $28). These costs are conservative, in 2016 I was only spending 100 RMB a day on taxis in Beijing, which would have been my parking costs if I drove instead.