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Working paper

We study groups of bimeromorphic and biholomorphic automorphisms of projective hyperkähler manifolds. Using an action of these groups on some non-positively curved space, we deduce many of their properties, including finite presentation, strong form of Tits' alternative and some structural results about groups consisting of transformations with infinite order.

Added: Dec 2, 2018

Working paper

For a geometrically rational surface X over a perfect field of characteristic different from 2 that contains all roots of 1, we show that either X is birational to a product of a projective line and a conic, or the group of birational automorphisms of X has bounded finite subgroups. As an auxiliary result, we show boundedness of finite subgroups in anisotropic linear algebraic groups of bounded rank and number of connected components. Also, we provide applications to Jordan property for groups of birational automorphisms.

Added: Oct 21, 2018

Working paper

The aim of this study is to validate a Russian version of the Schwartz Value Survey using cognitive interviewing. This paper aims to explore the issue of whether respondents interpret the values proposed in the survey in the way intended by the author. An analysis of the results reveals problems with understanding the wording, which are due both to subtle differences in translation and the cultural context. The findings of the qualitative analysis allow for a better understanding of the quantitative data. A number of recommendations are given to the researchers applying this Russian-language SVS.

Added: Dec 13, 2012

Working paper

This paper estimates average and marginal returns to schooling in Indonesia using a non-parametric selection model estimated by local instrumental variables, and data from the Indonesia Family Life Survey. The analysis finds that the return to upper secondary schooling varies widely across individual: it can be as high as 50 percent per year of schooling for those very likely to enroll in upper secondary schooling, or as low as -10 percent for those very unlikely to do so. Returns to the marginal student (14 percent) are well below those for the average student attending upper secondary schooling (27 percent).

Added: Oct 26, 2012

Working paper

Granin S.,

math. arxive. Cornell University, 2015
Added: Oct 30, 2015

Working paper

Why did the Russian experiment with electoral democracy fail in the early Twentieth century? I examine the results of the elections to the first Duma in 1906 on the province (Guberniya) level in conjunction with the socioeconomic data from the 1897 national census, in order to show that at the onset of the first Duma elections, economic class partitions, an emblem of the radical oppositional campaign, mapped only onto the Center Right party politics of the Octobrists, not the rest of the political spectrum. The Bolshevik vote distribution on the Guberniya level in the 1917 elections to the Constituent Assembly, on the other hand, reveals significant correlations with those of the Octobrists’ in 1906. For both parties, the industrial sector, in contrast to the agricultural workforce, provided a significant boost in the votes. The same reinforcing link between the electorate and the Duma was severed, following interventions in favor of the landed elite from 1907 onward.

Added: Dec 14, 2016

Working paper

This study aims to present that A.V. Mikhailov’s historical method is systematic. Special attention is given to historical-anthropological dimension of the A. V. Mikhailov's theory of baroque. The article shows that Mikhailov's historical anthropology should be viewed as a constitutive part of his “Kulturwissenschaft”, opposed both to the literary science and to the positivist historiography by means of commitment to historize human sciences (the notion of «new historiсism»).

Added: Oct 20, 2017

Working paper

The paper illustrates the governement’s agility in response to opposition protests and the debacle of parliamentary elections. We explore the evolution of Kremlin strategies from a reliance on cooptation to more coercive strategies—a trend that continued after Putin’s election in March. These strategies were successful in mobilizing core voters, creating common identity among participants, and containing the electoral effects of the opposition protests. However, the governement’s’s strategy also embodied significant costs that are likely to have longer-term influences and did little to build a true movement of regime loyalists. The Kremlin’s rigid definition of both the symbols and rhetoric of Putinism left little room for participants to participate in the production of symbols and language. While the narratives imposed from above help Putin’s supporters to participate in political life in limited ways, they remain unable to formulate and articulate independent political positions. As a result, supporters remain highly dependent on the state. Deprived of the benefit of hearing supporters’ demands, this strategy also leaves the state in peril of further losing touch with its political base.

Added: Jan 22, 2013

Working paper

We construct a filtration on integrable highest weight module of an affine Lie algebra whose adjoint graded quotient is a direct sum of global Weyl modules. We show that the graded multiplicity of each Weyl module there is given by a corresponding level-restricted Kostka polynomial. This leads to an interpretation of level-restricted Kostka polynomials as the graded dimension of the space of conformal coinvariants. In addition, as an application of the level one case of the main result, we realize global Weyl modules of current algebras of type ADE in terms of Schubert manifolds of thick affine Grassmanian, as predicted by Boris Feigin.

Added: Dec 11, 2017

Working paper

Bachet's game is a variant of the game of Nim. There are n objects in one pile. Two players make moves one after another. On every move, a player is allowed to take any positive number of objects not exceeding some fixed number m. The player who takes the last object loses. We consider a variant of Bachet's game in which each move is a lottery over set {1,2,…,m}. Outcome of a lottery is the number of objects that player takes from the pile. We show that under some nondegenericity assumptions on the set of available lotteries the probability that the first player wins in subgame perfect Nash equilibrium converges to 1/2 as n tends to infinity.

Added: Mar 22, 2019

Working paper

This article explores color as marketing tool. The goal of the research is to analyze the perception of promotion materials with different color background. Empirical study helps to identify several groups of differently colored promotion messages perception in relation to different product categories. It may be concluded that general concepts of color preferences changed as applied to particular product category field - every one of which has a color language of its own - in terms of marketing and other conventions.

Added: Apr 26, 2013

Working paper

This paper investigates the relationship between operating cost efficiency and the loan quality of Russian banks. It tries to answer the question whether it is always beneficial for banks to be highly cost efficient (the “bad management” hypothesis) or whether this higher cost efficiency could mean inadequate spending on borrower screening, which could subject banks to higher credit risk exposures in the future (the “skimping” hypothesis)? Our main result implies that, while the “bad management” hypothesis holds on average for the banking sector as a whole, the “skimping” hypothesis could be the case for those Russian banks that are not just highly cost efficient, as predicted by Berger and DeYoung (1997) for US banks, but that at the same time pursue aggressive strategies in the market for loans to households and non-financial firms, especially during the pre-crisis periods when banks are too optimistic to pay increased attention to the quality of borrowers in order to extract higher profits in the short run. Interestingly, we show that the “skimping” strategy is not the case for those Russian banks that demonstrate a lower equity-to-assets ratio and that are highly cost efficient at the same time because, as we believe, higher financial leverage forces these banks to filter out low quality borrowers to be able to repay borrowed funds. From perspective of regulatory policy, these conclusions provide clear arguments in favor of differential prudential regulation in Russia, which could, if being implemented, positively affect the loan quality of both banks that are skimpers (through restricting loans growth by higher capital adequacy requirements and/or increased payments to the Russian Deposit Insurance Agency) and banks that are not (through eliminating incentives to grow too fast), thus improving the stability of the banking sector as a whole.

Added: Oct 25, 2013

Working paper

The paper analyses the first French critiques of the two Mikhail Bakhtin’s monographs and the careful exploration of these reviews enables to explain why they presented him as a formalist. It also traces the reasons of irrelevance of the thinker’s ideas in the early French reception.

Added: Oct 18, 2016

Working paper

The Kazakhstan banking system is increasingly viewed as more advanced than the Russian system. Kazakhstan adopted the International Accounting System (IAS) in 2003 and the Basel II norms in 2005, while Russia has yet to fully adopt either IAS or Basel II. In this paper, bank data for 2002-2006 are used to estimate models of bank cost efficiency. In contrast to most previous papers, no significance difference is found for the average cost efficiency scores of banks for the two countries during 2002-2006. How banks are ranked for efficiency depends upon the chosen model (input and output sets). An interesting insight is the finding that most banks in both countries are below optimal size.

Added: Jun 15, 2013

Working paper

This paper considers the comparative efficiency of public, private, and foreign banks in Russia, a transition economy with several unusual features. We perform stochastic frontier analysis (SFA) of Russian bank-level quarterly data over the period 2005–2013. The method of computation of comparative cost efficiency is amended to control for the effect of revaluation of foreign currency items in bank balance sheets. Public banks are split into core and other state-controlled banks. Employing the generalized method of moments, we estimate a set of distance functions that measure the observed differences in SFA scores of banks and bank clusters (heterogeneity in risk preference and asset structure) to explain changes in bank efficiency rankings. Our results for comparative Russian bank efficiency show higher efficiency scores, less volatility, and narrower spreads between the scores of different bank types than in previous studies. Foreign banks appear to be the least cost-efficient market participants, while core state banks on average are nearly as efficient as private domestic banks. We suggest that foreign banks gain cost-efficiency when they increase their loans-to-assets ratios above the sample median level. Core state banks, conversely, lead in terms of cost efficiency when their loans-to-assets ratio falls below the sample median level. The presented approach is potentially applicable to analysis of bank efficiency in other dollarized emerging markets.

Added: Aug 11, 2015

Working paper

This paper adds to the literature on banking in transition with regard to the comparative efficiency of different bank groups. We conclude that, to prevent the distoring effect of currency and securities revaluations, a refined definition of bank revenue is proper in comparative bank efficiency computations for countries with substantial volatility in financial markets.

Added: Mar 7, 2015

Working paper

This paper adds to the literature on banking in transition with regard to the comparative efficiency of public, private and foreign banks. We perform stochastic frontier analysis (SFA) of Russian bank-level quarterly data from 2005 to 2013. The method of computation of comparative cost efficiency is amended to control for the effect of the revaluations of foreign currency items in bank balance sheets. All public banks are split into the core and other state-controlled banks. We employ the generalized method of moments to estimate a set of distance functions measuring the observed differences in the SFA scores of banks and bank clusters, depending on the heterogeneity in risk preference and asset structure. These distance functions explain the changes in bank efficiency rankings. Our results on comparative bank efficiency are qualitatively different from those in mainstream papers. The efficiency scores of Russian banks are higher and less volatile, and spreads between the scores of different bank types are narrower than hitherto believed. Foreign banks appear as the least cost-efficient type of market participants, while the core state banks are, on average, nearly as efficient as domestic private banks. We suggest that foreign banks are capable of being more cost efficient than others if they increase loans-to-assets ratios above the sample median level. Core state banks, conversely, lead in terms of cost efficiency if their loans-to-assets ratio falls below the sample median level. Our approach is potentially applicable to the analysis of bank efficiency in other dollarized emerging markets.

Added: Jun 15, 2015

Working paper

The paper examines how type of ownership affects the profit efficiency of Russian banks. Using bank-quarter data for selected banks in the period 2004–2015, we combine stochastic frontier analysis (SFA) methodology with an intermediary approach to assess profit efficiency. Our key findings show that foreign-owned banks are the most efficient, followed by state-owned banks and private domestic banks. We also find that the profit efficiency of foreign-owned banks was higher than that of other banks during the economically stable periods of 2004Q1 to 2008Q2 and 2014Q1 to 2015Q3, and that state-owned banks were more efficient than others in the period of financial turmoil from 2008Q3 to 2013Q4 thanks to state support. These results are robust when we consider these banks in terms of branch network diversity, risk preferences, and specialization.

Added: Feb 22, 2018

Working paper

Added: Mar 11, 2013

Working paper

There is a special type of corpora, a poetic corpus, which have a special metric markup. They allow us to do the study of poetry by the methods that are familiar to corpus linguistics in general. We have created the Bashkir poetic corpus. It allows us to answer some questions about the structure of the Bashkir poetry.
Texts in the corpus are annotated with morphological tags, each single token having a set of tags, and with special metric tags, enabling search in lines of specific meter, in rhyming position, etc.

Added: Apr 15, 2015

Working paper

We get sufficient conditions for the full basic automorphism group of a complete
Cartan foliation to admit a unique (finite-dimensional) Lie group structure in the category
of Cartan foliations. In particular, we obtain sufficient conditions for this group
to be discrete. Emphasize that the transverse Cartan geometry may be noneffective.
Some estimates of the dimension of this group depending on the transverse geometry
are found. Further, we investigate Cartan foliations covered by fibrations and ascertain
their specification. Examples of computing the full basic automorphism group of
complete Cartan foliations are constructed.

Added: Nov 10, 2014