Conclusion is robust
While maintaining the claimed growth increment from the Romney plan is likely to be slight, the TPC analysis does consider whether growth predicted by Mankiw (a Romney backer) and Weinzeri would rescue the plan. They conclude it makes little difference.
The estimate of a 14.7 percent revenue offset based on the Mankiw/Weinzeri study is markedly different from the claim made in another pro-Romney simulation done using a neo-classical growth model by Entin and McBride - follow the Inconsistency cross-link for see more about this.