What is the value of the Okun coefficient? A meta analysis

Christophe Tavera, Roger Perman, Gaëtan Stephen

Research output: Contribution to journalArticle

Abstract

We selected a sample of 522 estimates of the Okun’s Law coeffi cient from literature to uncover the reasons for the diff erences in empirical results across studies and to estimate the ‘true’ OLC with meta-regression methodology. We show that there is evidence of both type I and type II bias amongst the papers studied. Taking into account those biases and then evaluating the 95% confi dence intervals of the true eff ects estimated with various methodologies, we fi nd that the estimated true OLC vary between a minimum value of –0,40 and a maximum value of –0,12. Moreover, the estimated OLCs are signifi cantly larger (in absolute value) with models using regional data or a linear time trend fi ltering procedure. On the other hand we fi nd that lower absolute values of the OLC are obtained with models using quarterly (or semestrial) data bases, data for developing countries, or non-linear models.
Translated title of the contributionWhat is the value of the Okun coefficient? A meta analysis
LanguageFrench
Pages107-137
Number of pages31
JournalStudia Oeconomica Posnaniensia
Volume4
Issue number3
DOIs
Publication statusAccepted/In press - 8 Apr 2016

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Coefficients
Meta-analysis
Methodology
Developing countries
Data base
Empirical results
Time trends

Keywords

  • macroeconomics
  • Okuns Law
  • meta regression

Cite this

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title = "Quelle est la valeur du coefficient d'Okun? Une analyse de type meta-regression",
abstract = "We selected a sample of 522 estimates of the Okun’s Law coeffi cient from literature to uncover the reasons for the diff erences in empirical results across studies and to estimate the ‘true’ OLC with meta-regression methodology. We show that there is evidence of both type I and type II bias amongst the papers studied. Taking into account those biases and then evaluating the 95{\%} confi dence intervals of the true eff ects estimated with various methodologies, we fi nd that the estimated true OLC vary between a minimum value of –0,40 and a maximum value of –0,12. Moreover, the estimated OLCs are signifi cantly larger (in absolute value) with models using regional data or a linear time trend fi ltering procedure. On the other hand we fi nd that lower absolute values of the OLC are obtained with models using quarterly (or semestrial) data bases, data for developing countries, or non-linear models.",
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Quelle est la valeur du coefficient d'Okun? Une analyse de type meta-regression. / Tavera, Christophe; Perman, Roger; Stephen, Gaëtan.

In: Studia Oeconomica Posnaniensia, Vol. 4, No. 3, 08.04.2016, p. 107-137.

Research output: Contribution to journalArticle

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T1 - Quelle est la valeur du coefficient d'Okun? Une analyse de type meta-regression

AU - Tavera, Christophe

AU - Perman, Roger

AU - Stephen, Gaëtan

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AB - We selected a sample of 522 estimates of the Okun’s Law coeffi cient from literature to uncover the reasons for the diff erences in empirical results across studies and to estimate the ‘true’ OLC with meta-regression methodology. We show that there is evidence of both type I and type II bias amongst the papers studied. Taking into account those biases and then evaluating the 95% confi dence intervals of the true eff ects estimated with various methodologies, we fi nd that the estimated true OLC vary between a minimum value of –0,40 and a maximum value of –0,12. Moreover, the estimated OLCs are signifi cantly larger (in absolute value) with models using regional data or a linear time trend fi ltering procedure. On the other hand we fi nd that lower absolute values of the OLC are obtained with models using quarterly (or semestrial) data bases, data for developing countries, or non-linear models.

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