How Does Musk's Government Funding Compare To Competitors?

Rei writes: We recently discussed an article in the LA Times complaining about how Elon Musk has built his corporate empires — Solar City, Tesla Motors and SpaceX — on the back of government subsidies. However, how does the funding compare in context to various competitors? USC professor Greg Autry breaks it down, noting among other things that SpaceX's competitors have benefited from decades of tremendous government money and a launch monopoly, while the Volt receives — on a percentage basis — 2 1/2 times greater subsidy than a Model S, and was developed on the government's dime.