are there any statistics / studies on this kind of thing? or the similar claim from space exploration?
i don't dispute there are useful advances, but i wonder whether they would have been made anyway (perhaps at a lower overall cost, if "cost" can be at all well defined).
[edit: i see from the comments below that maybe i need to repeat i don't dispute there are useful advances and the question are there any statistics / studies on this kind of thing?]