The Analysis of Interregional Migrations in Polandi n the Period of 2004-2010 using Panel Gravity Model Journal title: Dynamic Econometric Models Authors: MichaĆ Pietrzak, Natalia Drzewoszewska, Justyna Wilk Subject(s): Economics, Orthopedics, Health Care Sciences & Services, Medicine, Research & Experimental, Public, Environmental & Occupational Health, Primary Health Care, Business, Business, Finance