Did the study account for the fact that those states already were adding jobs faster than the other states?
Yes. RTFA.
I don't think I understand your point. How is anybody being denied "academic freedom?" Who is stopping these PhDs from studying whatever they want? Or by academic freedom do you mean "the freedom to make somebody else pay them for their studies?"
This isn't a dig, I really feel like I'm missing a piece of the puzzle because I just don't get the outrage, particularly with this statement: "The idea of academic freedom being available only to those who have already made their most significant contribution (and therefore get tenure which is supposed to provide academic freedom) is an idea that needs to be discussed. It is a problem." If I only have a small pool of money to pay tenured professors, why wouldn't I want to select the ones that have proven themselves?
This is generally done by the same people who use the term "elites" derisively. There's a culture - often promulgated by Libertarians - that people who aren't directly enhancing some corporation's bottom line somewhere don't deserve recognition or respect. The fact is, someone who has made significant contributions to their field deserves some job security.
It's not that these naysayers have a better system for who deserves tenure (or, if they want to eliminate tenure altogether, a tenure-like protection from Administrative whims). They don't want anyone to have such protections, because then scientists who tell inconvenient truths about politics or science ("Hey, did you know Climate Change might be a problem?) can be easily silenced by politically or corporate-backed powers.
Is the tenure system perfect? God, no, but what system involving human pecking order is? But it's pretty good, actually, for the most part! They're a reason the western-style educational system has been rocking it hardcore for hundreds of years now. And the fact is, the attack on professors, tenure, and the scientific elites in general is mostly coming from the corners that are trying to tear down science as an edifice in general.
Programming is an unnatural act.