but not all, conditions that give rise to job lock and not completely. If you combine this fact with the prior paragraph, you’ll notice that we have a situation in which we neither fully know the extent of the problem nor the extent to which the ACA will address it. In their 2002 literature review, Gruber and Madrian also commented on the fact that we do not know the full welfare implications of job lock. As best I can tell, the literature has not advanced.... Nevertheless, the labor market distortions of the pre-ACA insurance landscape... are real... weighed heavily on the minds of economists... motivated some of the provisions of the health reform law.