Enough ambiguity and vagueness to be the subject of endless columns. Here are my 9 criteria to good regulation. 9 is a good baseball number. Controversial - You might measure court set backs. And also on how much your opponents are willing to go to court, or whether they are frightened to go to court.
Openness is a virtue in regulation.
The worst part is that secret deals can't be seen or measured. Here again is a hard trait to measure. Surely every agency has a Web site listing the costs and benefits of regulation. No agency does. No agency even tries.