Economic and statistical research of development of rural areas in Samara region O. F. Pyatova, T.V. Shumilina, M. N. Kupryaeva, O. V. Alekseeva and L. Dvorskiy BIO Web Conf., 17 (2020) 00014 Published online: 28 February 2020 DOI: 10.1051/bioconf/20201700014