The article examines how different regions in Russia are getting closer in terms of their economic growth rates. The researchers used a neoclassical growth model to analyze this process, considering factors like human capital and migration. They found that Russian regions are converging economically at a rate of about 2% per year. Interestingly, they didn't see a clear link between human capital and economic growth, but they did find that migration between regions and how one region's growth affects another play a role in this convergence.