Results 261 to 270 of about 941,726 (292)

Real beta and sigma convergence in 27 transition countries, 1990–2005

Post-Communist Economies, 2009
The aim of this study is a detailed analysis of real economic convergence in 27 former socialist (or transition) countries. We focus on two concepts of convergence: absolute (unconditional) beta convergence and sigma convergence. The time frame of our study is 1990–2005. We provide a broad empirical picture of convergence.
Ryszard Rapacki, Mariusz Próchniak
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The wedge and sigma convergence among U.S. states

Atlantic Economic Journal, 1996
The paper attempts to empirically quantify the factors underlying sigma convergence among the contiguous states of the U.S. Using annual state data the study finds a significant effect of the wedge in explaining the variation in state per capita productivity.
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σ-convergence theory and its applications in fuzzy lattices

Information Sciences, 2004
Let \((L(M),\delta)\) be a topological molecular lattice with a set \(M\) of \(\vee\)-irreducible elements and a topology \(\delta\). The authors introduce the concepts of \(\sigma\)-closure and \(\sigma\)-interior operators in \((L(M),\delta)\) and discuss relationships between these operators and closure, \(\theta\)-closure and Urysohn closure ...
Shui-Li Chen, Sheng-Tao Chen, Xiang-Gong Wang   +2 more
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On infinite matrices and lacunary σ-convergence

Applied Mathematics and Computation, 2011
A lacunary sequence is an increasing sequence \(\theta = (k_r)\) of non-negative integers where \(k_0=0\) with \(k_r-k_{r-1} \to \infty\) as \(r\to \infty\). Let \(\sigma\) be a one-to-one mapping from the set of natural numbers into itself. A continuous linear functional \(\phi\) on \(\ell _{\infty}\) is said to be an invariant mean or a \(\sigma ...
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Sigma-Convergence in the OECD: Transitional Dynamics or Narrowing Steady State Differences?

2002
The empirical literature of growth has steadly improved the econometric methods used mainly to address the effect of cross-country heterogeneity in the estimated convergence rate. In this paper, we highlight an important implication of this process of econometric refinement that has so far received little attention.
Javier Andrés, José Emilio Boscá Mares, Rafael Doménech   +2 more
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Sigma-convergence as a measure of territorial cohesion

2013
The proposed paper will focus on a specific tool for interpreting the indicators of territorial cohesion selected in the ESPON INTERCO project : sigma-convergence. By means of a combined analytical and participatory approach, INTERCO selected and prioritised indicators usable by policy makers.
Dao, Quoc-Hy, Plagnat Cantoreggi, Pauline, Rousseaux, Vanessa   +2 more
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On beta and sigma convergence of Czech regions [PDF]

, 2013
The aim of the article is to examine beta and sigma convergence of fourteen Czech regions during 1995-2009. Using real GDP per capita panel data from the Czech Statistical Office it was found that Czech regions σ-diverged in the period and this divergence was accelerating in time regardless of whether the capital city Prague was included among regions ...
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Beta and sigma convergence of incomes of municipalities in Lubusz Voivodeship between 1999 and 2019

2021
In studies on regional and local development, the subject of inter-est are disproportions between territorial units constituting a given munici-pality. Changes in these categories over time are an important quality, too. This leads to the formulation of the concepts of convergence and divergence processes in the economic development of the studied ...
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Income Development and Sigma convergence in South–South Agreement Areas [PDF]

, 2012
Some of the new trade and economic geography theory findings are quite critical concerning the so called South-South-agreements. This study contributes to this discussion by means of an empirical analysis of a representative set of South-South integration areas.
Yvonne Sperlich, Stefan Sperlich
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DOUBLE sigma-CONVERGENCE LACUNARY STATISTICAL SEQUENCES

2009
In this paper we introduce two notions of a-convergence for double sequences namely, a-statistically P-convergence and lacunary or-statistically P-convergence. These concepts are used to present multidimensional inclusion theorems.
Savaş, Ekrem, Patterson, Richard F.
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