“…The autonomous districts (okrugs) were excluded from the analysis, since, firstly, they form a part of the corresponding oblasts and, secondly, the GRP figures for them are available only starting from 2001. Therefore, our sample includes 76 regions over the period 1998-2006. A number of authors (e.g., Hanson, 2006;Lugovoi et al, 2007;Zubarevich, 2005) claim that when comparing the per capita GRP or, equally, studying the process of convergence one has to take into account rather large regional differences in price level. Therefore, in addition, to the GRP corrected for the price changes over time using the GRP deflator, we considered GRP corrected also for the price differences across space using the purchasing power parity (PPP) factors computed by Granberg and Zaitseva (2002a).…”