TY JOUR TI THEORETICAL AND EMPIRICAL APPROACHES TO THE STUDY OF CONVERGENCE OF SOCIAL AND ECONOMIC DEVELOPMENT OF THE COUNTRIES OF THE AZOV-BLACK SEA BASIN KW differentiation KW uneven development KW convergence KW divergence KW empirical evaluation KW the Azov-Black sea basin JO Vestnik of Astrakhan State Technical University. Series: Economics AU Pshenichnyh, Y.. AU Kolchina, O.. AU Grezina, M.. PY 2014 IS 2014 PB Astrakhan State Technical University