Апробация методики спецификации моделей стохастической границы с учетом возможной зависимости компонент ошибки
In the paper technical efficiency of Russian plastic and rubber production firms in 2006–2010 is estimated by SFA. It is demonstrated that increasing firm size will cause increase in its efficiency and also there is increasing returns to scale in the sector. This result is robust for various specifications of the production function and SFA models. Autocorrelation of efficiency estimates is considered as a measure of their persistency.
Paper presents research findings devoted to technical efficiency of banks based on financial reports prepared in accordance with Russian accounting standards (RAS) and international financial reporting standards (IFRS). Key finding is that these estimates vary not only in absolute terms, but also across time and with respect to banks ranks.
In literarure there is no single answer to the question, whether the growth of imports in industry leads to decrease or to increase the technical efficiency: possible effect of different mechanisms. In this paper we estimate the stochastic production frontier using firm-level data for food industry in 2005–2011, taking into account a possible relationship between changes in imports and firm’s technical efficiency. We use the «Ruslana» (Bureau van Dijk) database, which contains financial information on companies in Russia. Our results show that in food industry technical efficiency is reducing while import share is increasing.
We consider certain spaces of functions on the circle, which naturally appear in harmonic analysis, and superposition operators on these spaces. We study the following question: which functions have the property that each their superposition with a homeomorphism of the circle belongs to a given space? We also study the multidimensional case.
We consider the spaces of functions on the m-dimensional torus, whose Fourier transform is p -summable. We obtain estimates for the norms of the exponential functions deformed by a C1 -smooth phase. The results generalize to the multidimensional case the one-dimensional results obtained by the author earlier in “Quantitative estimates in the Beurling—Helson theorem”, Sbornik: Mathematics, 201:12 (2010), 1811 – 1836.
We consider the spaces of function on the circle whose Fourier transform is p-summable. We obtain estimates for the norms of exponential functions deformed by a C1 -smooth phase.