my mentor, murray roth bard, used to say what we ought to do is have consumption plus investment minus government to calculate the gdp because it would be closer -- not that, that would just be a rough approximation. it wouldn't be that we're saying every penny that goes to government is a negative. although in some sense it is. but that this is a loss when that occurs because it's in coercion. whereas in the market, like with your tie or my wristwatch, there's a benefit. every market transaction's mutually beneficial, otherwise it wouldn't occurred. whereas with the government you don't get that. >> so, professor block, when it comes to space capitalism, we're moving in that direction, aren't we?n elon musk's spacex, etc. >> guest: that's interesting. we have a whole chapter devoted not just to elon musk, maybe 10 pages to him, and maybe 6 or 7 other space entrepreneurs who, like him, are building rockets. and we have to give him credit. i mean, with the government what they do is they shoot up a rocket, and then it's gone. of with elon musk, they shoot up a rocket, the rocket comes d