This paper reassesses a finding by Martin Prachowny (1993) that the value of the Okun coefficient for the United States (linking unemployment changes to output changes) is only around −0.67 rather than around the more typical value of −2.25. Using a cointegration framework, and the same data sets as Prachowny, we find, for one of the data sets, that the Okun coefficient is much closer to a value of −2.25, which supports previous research work.
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Attfield et al. (1997) studied this question.
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