\Sigma-convergence

Beta-convergence and sigma-convergence in corporate governance in Europe

Article history: This paper tests for beta-convergence and sigma-convergence in the corporate governancemodels, using a samAccepted 12 July 2012 ple of corporate governance ratings for 198 European corporations listed on the FTSE Eurofirst 300 index. A piecewise linear regression is deployed to select amodel and the Poisson pseudo-maximum likelihood estimator JEL classification: is also applied...

The Convergence of Six Sigma and Process Management

Process Management and Six Sigma methodologies have been in existence for more than 15 years. Both approaches to business performance improvement have assisted and continue to help businesses improve their performance. Both Gartner and AMR have taken a bullish position on the adoption of Process Management. Currently, 25% of US based companies with annual revenue greater than $200 million have ...

Sigma Convergence versus Beta Convergence: Evidence from U.S. County-Level Data

In this paper, we outline (i) why σ -convergence may not accompany β-convergence, (ii) discuss evidence of β-convergence in the United States, and (iii) use U.S. county-level data containing over 3,000 cross-sectional observations to demonstrate that σ -convergence cannot be detected at the county level across the United States, or within the large majority of the individual U.S. states conside...

Sigma Receptor Activation Mitigates Toxicity Evoked by the Convergence of Ischemia, Acidosis and Amyloid-beta

Sigma Versus Beta-convergence in EU28 in Financial Crisis and Post- crisis Period

This paper focuses on evaluation of the impact of the global financial crisis on the process of real convergence within the EU28 economies. The beta-convergence approach is verified by the use of crosssectional linear regression analysis. The sigma-convergence is tested by standard deviation of real GDP per capita. The aim is to verify the hypothesis that the betaand sigma-convergence (βand σ-c...