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Comparison of cross-country measures of sigma-convergence in per-capita income, 1960–2010

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  • Rati Ram

Abstract

The evidence on sigma-convergence in income indicated by (a) coefficient of variation (CV) and (b) SD of logarithms (SDLOG) is considered for a large cross-country sample covering the period 1960–2010. Three main points are noted. First, the two measures yield qualitatively similar scenarios, and both indicate sigma-divergence in income over the period. Second, however, they do show large differences in the rate of change in income inequality, and SDLOG indicates divergence at a much higher rate than CV. It seems likely that SDLOG would indicate greater divergence, or weaker convergence, than CV in many cases. Third, therefore, researchers are urged not to rely too heavily on one or the other measure for an inference on sigma-convergence, and it seems appropriate to consider both for drawing reasonable conclusions on convergence in income and many other variables studied by scholars.

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  • Rati Ram, 2018. "Comparison of cross-country measures of sigma-convergence in per-capita income, 1960–2010," Applied Economics Letters, Taylor & Francis Journals, vol. 25(14), pages 1010-1014, August.
    • Handle: RePEc:taf:apeclt:v:25:y:2018:i:14:p:1010-1014
    DOI: 10.1080/13504851.2017.1391992
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    Cited by:

    1. Gonzales-Rocha, Erick & Mendez-Guerra, Carlos, 2018. "Increasing productivity dispersion: Evidence from light manufacturing in Brazil," MPRA Paper 88478, University Library of Munich, Germany.
    2. Rati Ram, 2021. "Income convergence across the U.S. states: further evidence from new recent data," Journal of Economics and Finance, Springer;Academy of Economics and Finance, vol. 45(2), pages 372-380, April.
    3. Marrero, Ángel S. & Marrero, Gustavo A. & González, Rosa Marina & Rodríguez-López, Jesús, 2021. "Convergence in road transport CO2 emissions in Europe," Energy Economics, Elsevier, vol. 99(C).
    4. Syed Abul, Basher & Jobaida, Behtarin & Salim, Rashid, 2022. "Convergence across Subnational Regions of Bangladesh – What the Night Lights Data Say?," MPRA Paper 111963, University Library of Munich, Germany.
    5. Kadigi, Reuben M.J. & Robinson, Elizabeth & Szabo, Sylvia & Kangile, Joseph & Mgeni, Charles P. & De Maria, Marcello & Tsusaka, Takuji & Nhau, Brighton, 2022. "Revisiting the Solow-Swan model of income convergence in the context of coffee producing and re-exporting countries in the world," LSE Research Online Documents on Economics 115636, London School of Economics and Political Science, LSE Library.
    6. Carlos Mendez, 2020. "Regional efficiency convergence and efficiency clusters," Asia-Pacific Journal of Regional Science, Springer, vol. 4(2), pages 391-411, June.

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