KNUCKLEDR--- oops, sorry.
I appreciate any study that a top notch consultant like McKenzie has to offer even if they are mostly made up of Harvard grads.
My response is the Massachusetts experience. When I posed this question previously a conservative tried to change the subject to insurers being forced to take on pre existing conditions, a point that has nothing to do with the question at hand. So, we have one hand a well thought out opinion, and on the other a factual experience with a 6 year track record.
Now, there are some significant differences between this state and the country as whole. Its far wealthier for one and had less uninsured people when the program which I'll call Romneycare was first launched. However, businesses aren't much different. Liberty Mutual, EMC, Boston Scientific, etc all should have dumped their employees onto the state by now but didn't.
As to why this hasn't happened, I'll speculate for two reasons. 1) It may not be that much cheaper to dump your employees off onto the state even before counting all the administrative costs it would take to do so, and 2) I question whether companies really want to pay their employees 20K more for the same job as another company down the street. More likely they'd pay 5 grand more and pocket the difference which would cause smelly Occupy Wherever protestors to camp out in their lobby. At this point it might not be worth the trouble.
A lot of analysis of this particular issue looks at things in a bubble. Meaning the idea that people will say, oh the fine is 500, insurance is 1000 so I'm up 500 if I don't get it. That's a faulty analysis IMHO because you're getting nothing for paying a fine but getting something (coverage) for your thousand bucks. Not sure if McKenzie did that or not, but human behavior is a lot more complicated than some of the speculation I've seen.