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2. Okun’s Macroscope: Output and Employment after the Great Recession;Daly;Manuscript,2012
3. Potential GNP: Its Measurement and Significance.;Okun;Reprinted as Cowles Foundation Paper 190,1962
4. ”How Useful Is Okun’s Law?”.;Knotek;Federal Reserve Bank of Kansas City, Economic Review, Fourth Quarter,2007
5. An unstable Okun’s Law, not the best rule of thumb.;Meyer;Economic Commentary,2012