New places are new people. Jewish life in St. Petersburg and Moscow in the 19th century

In the book of the German historian Ivonn Kleinmann, the process of the formation and interaction of Jewish communities and elites in St. Petersburg and Moscow is considered. In the 19th century, the “two capitals” of the Russian Empire were a kind of field for experiments in the field of Jewish politics.
How did the Russian capital"s entourage mainly influenced the life of the Jews for decades? Did they manage to get rid of themselves with migrants and become Petersburg and Moscow Jews, or maybe even Petersburgers and Muscovites? Considering specific examples and based on various sources (official documents, correspondence, Russian and Jewish periodicals of that time), the author gives answers to these and many other questions