BCG

While BCG cited low labor, natural gas and electricity costs, Williamson emphasized lead-times.

However, BCG's report argues that we are currently just witnessing the beginning of a major shift in global manufacturing.

BCG believes that would mean the U.S. unemployment rate could drop by up to three percentage points from its current rate of 7.4.

Now, BCG says there is more reason for people who make stuff in the U.S. to take heart.

He did so as a consultant for Bain & Company, which Romney joined in 1977 after leaving BCG.