ECB study questions Romer's Multiplier Estimate

See Krugman’s weak defense of Keynesian fiscal policy by James Pethokoukis of AEI. Excerpt:

Oh, and the conclusion of that ECB study:

The estimates reported here of the impact of such packages are much different from those reported in the paper by Christina Romer and Jared Bernstein. They report impacts on GDP for a broad fiscal package that are six times larger than those implied by government spending multipliers in a typical new Keynesian model and our calculations based on generous assumptions of the impacts of tax rebates and transfers on GDP. They also report job estimates that are six times larger than these alternative models. At the least, our findings raise serious doubts about the robustness of the models and the approach currently used