Or if you like, Coke v. Pepsi is not a good analogy because those products are substitutes for each other. A hydrogen fuel cell car is not a substitute for a gas car, people will not simply switch from one to the other due to price concerns. There are a lot of other factors, such as availability of fueling stations, proximity to qualified service providers, and so on. So the people who will buy the fuel cell car are going to buy one regardless. all this handout will do is add the $20k to the price for the manufacturer to profit. Now if the supporting infrastructure for both types of cars were identical, the analogy might be more apt. But in that case there would be no supposed need for the handout would there? Perhaps the money might be better spent building out fuel stations instead of just effectively handing it out to a politically favored car manufacturer.