Abstract:Ravenna. We thank Peter Downes, Vivek Tulpule for useful conversations and Will Martin and Jean-Pierre Chauffour for comments. McKibbin acknowledges support from ARC Discovery Grant DP0664024. The views expressed in the paper are those of the authors and should not be interpreted as reflecting the views of any of the above collaborators or of the Institutions with which the authors are affiliated including the trustees, officers or other staff of the ANU or The Brookings Institution.
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