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Of all publications in the section: 3 516
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Working paper
Rykov Y., Sinyavskaya Y., Koltsova O. Sociology. SOC. Высшая школа экономики, 2018. No. 83/SOC/2018 .
Social capital is often accumulated not only in ego-networks, but in larger communities. However, these communities, although seemingly visible through social media, are still underresearched. In this work, we examine аn online friendship network spanning over an entire middle-size city amounting to 194,601 users of VK social network site. We find that the share of user’s in-city friends contributes to his/her brokerage and information influence abilities. More importantly, the number of user’s online groups - that is, user’s access to diverse or disconnected communities - is positively related with his/her bridging capital, and negatively with the bonding capital. Finally, our research questions the validity of some of the existing social capital measures. Highlights  All-city network represents a mixture of small-world and scale-free graph models  Longer SNS use gives a cumulative advantage for making additional friendship ties  Participation in more SNS groups increases a user's online bridging social capital  The number of likes on a user’s wall is positively associated with online bridging  The share of local friends among all user’s VK friends increases online bridging
Added: Nov 30, 2018
Working paper
Kuchumova (Paramonova) Y. A. Economics/EC. WP BRP. Высшая школа экономики, 2017. No. WP BRP 181/EC/2017.
The suspension of a driver's license, the revocation of a passport or a professional license are used by the tax authorities as sanctions for failure to comply with tax obligations and are referred to as collateral tax sanctions. In this paper, I propose a new rationale for why it may be beneficial to use collateral tax sanctions for the purpose of tax enforcement. By affecting consumption and providing enforcement targeted to a group, collateral tax sanctions may allow the government to impose punishment correlated with an individual's earning potential. Such punishment also makes the effective tax rates correlated with an individuals' earning potential and therefore leads to a more effective redistribution of income. I show that the use of collateral tax sanctions could increase the CES social welfare function when the skill distribution of the targeted group first-order stochastically dominates the skill distribution of the other group and the social welfare function is sufficiently concave.
Added: Dec 4, 2017
Working paper
Feigin B. L., Makhlin I. arxiv.org. math. Cornell University, 2015
We present a new combinatorial formula for Hall-Littlewood functions associated with the affine root system of type A~n−1, i.e. corresponding to the affine Lie algebra slˆn. Our formula has the form of a sum over the elements of a basis constructed by Feigin, Jimbo, Loktev, Miwa and Mukhin in the corresponding irreducible representation.Our formula can be viewed as a weighted sum of exponentials of integer points in a certain infinite-dimensional convex polyhedron. We derive a weighted version of Brion's theorem and then apply it to our polyhedron to prove the formula.
Added: Aug 7, 2015
Working paper
Sergey L. Barinov, Petr K. International Relations. IR. Издательский дом НИУ ВШЭ, 2014
Euroregions is an important and quite popular mechanism of cross-border cooperation. Character of institutions development differs essentially between three groups of states, which use this mechanism: old members of the European Union; new members of the European Union (entered the EU after 2003); CIS members. This comparative research is concerned with the main circumstances of euroregions development in three areas noted above. The analyses show the fundamental differences between three Euroregion cases: Oresund, Pskov-Livonia and Dnieper. Those differences are noticeable in legislative basic, financing, cooperation issues, and even in four basic Euroregions principles realizing. Meanwhile we see that after fifteen years of copying the Euroregions in post-soviet countries the positive shifts occur in CIS members’ government perception and in the decision making process.
Added: Oct 11, 2014
Working paper
Kitrar Liudmila, Ostapkovich Georgy, Lipkind Tamara et al. Science, Technology and Innovation. WP BRP. Высшая школа экономики, 2017. No. 72.
This study compares Russian state information systems of industry with UN international recommendations. The harmonization of the Russian information system with successful international practices is necessary for measuring the main industrial indicator levels and dynamics in comparison with the information analogues of both cross-border and strategically important countries. This allows the estimation of the efficiency and competitiveness of Russian industry and the best decisions to be made at all levels of governance in Russia including in the technology and innovation policy sphere. The study shows that a significant number of annual, quarterly, monthly and weekly reporting forms within the Russian statistical system in the absence of a single questionnaire for obtaining comprehensive information from an enterprise and unified methodological recommendations do not solve the information gap problem. The available disaggregated information is not sufficient to analyse the quality and effectiveness of industrial policy, especially in comparison with global levels and tendencies of re-industrialization. The state statistical system needs modernization to reduce the reporting burden on enterprises and improve information transparency and comparability at the detailed level.
Added: Mar 7, 2017
Working paper
Pochinka O., Grines V., Van Strien S. Cornell University Library, 2017
In this paper we give a complete topological classification of orientation preserving Morse-Smale diffeomorphisms on orientable closed surfaces. For MS diffeomorphisms with relatively simple behaviour it was known that such a classification can be given through a directed graph, a three-colour directed graph or by a certain topological object, called a scheme. Here we will assign to {any} MS surface diffeomorphism a finite amount of data which completely determines its topological conjugacy class. Moreover, we show that associated to any abstract version of this data, there exists a unique conjugacy class of MS orientation preserving diffeomorphisms (on some orientation preserving surface). As a corollary we obtain a different proof that nearby MS diffeomorphisms are topologically conjugate.
Added: Dec 7, 2017
Working paper
Malyshev D. Working papers by Cornell University. Cornell University, 2015
We completely determine the complexity status of the dominating set problem for hereditary graph classes defined by forbidden induced subgraphs with at most five vertices.
Added: Jun 2, 2015
Working paper
Sawada T. Psychology. PSY. Высшая школа экономики, 2019
It is commonly believed that the visual system requires oculomotor information to perceive depth from binocular disparity. However, any effect of the oculomotor information on depth perception is too restricted to explain depth perception under natural viewing conditions. In this study, I describe a computational model that can recover depth from a stereo-pair of retinal images without using any oculomotor information. The model shows that, at least from a computational perspective, any oculomotor information is not necessary for perceiving depth from the stereo retinal images.
Added: Apr 20, 2019
Working paper
Svetlana Bankovskaya. Humanities. HUM. Basic Research Programme, 2014. No. 70.
   The paper is based on the outcomes and inferences from the experiment with urban heterotopia found on the Manezhnaya square in Moscow. The main point of the experimental design (ethnomethodological in its intent) is to explore in vivo the heterotopical properties of the urban environment as the condition of this environment’s creativity and its interaction with the mobile actors. Creativity of the urban environment was interpreted as a particular kind of spatial order accumulating in counterfinal effects of collective behavior in the unique constellation --“heterotopia”. The flâneur was chosen as the most appropriate actor displaying the properties of an object and that of a receptive mobile interactant. The object of the experiment was the fragment of the metropolitan environment which combines the logic of the urban social organization (embodied in its concrete place) and the paralogy of the counterfinality of the mobilities inside this particular environment.Two modes of interaction were provoked in the experiment: first, intended, but unpurposive action observed by the passage through the ambiances of the specific fragment of the city by the flâneur, and focusing on his affective states during these actions (the affective profile of the place thus was achieved); and second, observing and mapping the flâneur’s movements as a purposive interaction with the same fragment of the environment, but in the form of dérive (observation of the movement by the means of movement). The end of the observation in movement was to focus on the flâneur’s movements and to depict his route through the observable details of the spatial/social order of the environment.
Added: Oct 22, 2014
Working paper
Chulok A., Suslov D., Moiseichev E. Y. Science, Technology and Innovation. WP BRP. Высшая школа экономики, 2015. No. 34.
Last several decades have shown a steady broadening of national security issues’ spectrum along with an increase in the strictness of international competition driven by advances in high tech-nologies and other factors. National security agenda is nowadays comprised not only of defense issues per se, but also includes economic, social, cultural and other aspects. All this is strongly influenced by the technological trends and the very possession of critical technologies has be-come a pressing national security issue. Thus, we are witnessing a gradual convergence of na-tional security and technological agendas. Advocating a proactive approach to tackling national security risks of a technological nature, the authors make an attempt to outline the contemporary innovative methodology of assessing, harnessing and counteracting such risks. Their key rec-ommendation lies in the appeal for joining the forces of theorists and practitioners in the field of both national security and science, technology and innovation (STI) policy to overcome the cor-responding challenges.
Added: Mar 25, 2015
Working paper
Alexander Zlotnik, Čiegis R. Working papers by Cornell University. Cornell University, 2017. No. 1707.09943 .
Added: Aug 1, 2017
Working paper
Alexey Elagin. arxiv.org. math. Cornell University, 2016. No. 1610.02325.
We fi nd a criterion for an eff ective divisor D on a smooth surface to be left-orthogonal or strongly left-orthogonal (i.e. for the pair of line bundles (O;O(D)) to be exceptional or strong exceptional).
Added: Oct 15, 2016
Working paper
Novatorov E. V. SSRN Working Paper Series. Social Science Research Network, 2012. No. 2133237.
The objectives of the study were (a) to identify the reasons and concerns of those public administrators and marketing scholars who do not accept the usefulness of marketing in the public sector; (b) to deconstruct, comprehend, interpret, and critically appraise the current conceptualization of public sector marketing from the viewpoint of negativists identified in step (a); and (c) to reconstruct, redefine, reinterpret, and reoperationalize the current controversial conceptualization of public sector marketing into a new conceptualization in the context of park and recreation services. The critical theory approach to the study primary used non-empirical procedures data collection and analytic procedures which included investigative research, negative case analysis, and theoretical triangulation. These procedures were supplemented with empirical data collected from in-depth interviews with five scholars and with three parks and recreation managers. Results of the non-empirical procedures revealed the biased selective nature of the current conceptualization of public park and recreation marketing and the existence of alternative conceptualizations which have been ignored. The existing and alternative models were discussed with scholars and park and recreation managers. Support was found for the alternative models. From these data an alternative conceptualization of public park and recreation marketing was developed and named the concept of administered marketing. Implications for park and recreation managers are discussed. Directions for future research into the administratively managed park and recreation marketing concept are suggested.
Added: Sep 21, 2012
Working paper
Verbitsky M. arxiv.org. math. Cornell University, 2010. No. 1003.3174.
Let M be a G2-manifold. We consider an almost CR-structure on the sphere bundle of unit tangent vectors on M, called the CR twistor space. This CR-structure is integrable if and only if M is a holonomy G2 manifold. We interpret G2-instanton bundles as CR-holomorphic bundles on its twistor space.
Added: Nov 2, 2012
Working paper
Postylyakov S. Law. LAW. Высшая школа экономики, 2015. No. WP BRP 55/LAW/2015.
The article deals with relevant problems of determination of the objective limits of the prejudgment using the prejudgment of the particular types of court rulings as an example. The author concludes that the concept of «circumstances» should be defined as facts and established on their basis legal relations. The author considers that the court orders, the judgments in absentia, the judgments of dismissal due to the approval of the settlement as well as the higher court rulings that verify legality of previous judgments not verifying validity should be excluded from the objective limits of the prejudgment. The author analyzes rules of the draft of the Civil Procedure Code of the Russian Federation of 2000 and comes to the conclusion that Article 61 of the current Civil Procedure Code of the Russian Federation requires to be amended
Added: Oct 8, 2015
Working paper
Galkin S., Karzhemanov I., Shinder E. arxiv.org. math. Cornell University, 2016. No. 1602.06107.
On the projective plane there is a unique cubic root of the canonical bundle and this root is acyclic. On fake projective planes such root exists and is unique if there are no 3-torsion divisors (and usually exists but not unique otherwise). Earlier we conjectured that any such cubic root (assuming it exists) must be acyclic. In the present note we give a new short proof of this statement and show acyclicity of some other line bundles on those fake projective planes with at least 9 automorphisms. Similarly to our earlier work we employ simple representation theory for non-abelian finite groups. The novelty stems from the idea that if some line bundle is non-linearizable with respect to a finite abelian group, then it should be linearized by a finite (non-abelian) Heisenberg group. Our argument also exploits J. Rogawski's vanishing theorem and the linearization of an auxiliary line bundle.
Added: Feb 23, 2016
Working paper
Puchkin N., Spokoiny V. math. arxive. Cornell University, 2018
We consider a problem of multiclass classification, where the training sample Sn={(Xi,Yi)}ni=1 is generated from the model ℙ(Y=m|X=x)=ηm(x), 1≤m≤M, and η1(x),…,ηM(x) are unknown α-Holder continuous functions.Given a test point X, our goal is to predict its label. A widely used 𝗄-nearest-neighbors classifier constructs estimates of η1(X),…,ηM(X) and uses a plug-in rule for the prediction. However, it requires a proper choice of the smoothing parameter 𝗄, which may become tricky in some situations. In our solution, we fix several integers n1,…,nK, compute corresponding nk-nearest-neighbor estimates for each m and each nk and apply an aggregation procedure. We study an algorithm, which constructs a convex combination of these estimates such that the aggregated estimate behaves approximately as well as an oracle choice. We also provide a non-asymptotic analysis of the procedure, prove its adaptation to the unknown smoothness parameter α and to the margin and establish rates of convergence under mild assumptions.
Added: May 23, 2018
Working paper
Lyashevskaya O., Vlasova E., Litvintseva K. et al. Linguistics. WP BRP. НИУ ВШЭ, 2018. No. 77.
A data analysis tool of the Corpus of Russian Poetry (a part of the Russian National Corpus) is designed for quantitative research in various areas of versology and linguistics aspects of poetic texts. The core part, a statistic database of the corpus, includes annotation at the level of texts, verses, words as well as patterns of words, letters and stress. The tool allows a user to study certain properties (e. g. rhyming patterns, lexical co-occurrence) taken alone and in their interaction, both in the whole corpus and in subcorpora. Besides that, it facilitates contrastive studies of two chosen subcorpora and a few case studies demonstrating applicable methods and potential for further research in the field of the Digital literary studies.
Added: Dec 13, 2018
Working paper
Карась А., Pyle W., Schoors K. Институциональные проблемы российской экономики. WP1. НИУ ВШЭ, 2012. No. 03.
The empirical literature assessing the connection between land rights, access to  finance and investment activity has focused largely on actors that, for multiple reasons, might face difficulties accessing credit. Communities of small-scale farmers or poor urban households in developing countries, that is, may not be the best place to look for evidence as to whether more secure land rights are sufficient to facilitate borrowing by providing borrowers with a collateralizable asset. We explore this relationship in a setting in which fi  nancial market frictions are apt to be less severe – i.e., among large, urban, industrial enterprises. Exploiting policy-induced variation across Russian regions, we use recently-collected survey data to show that private rights to land do indeed facilitate access to external financing and promote investment. This finding is supplemented by additional survey evidence that points to private land serving as an important source of collateral.
Added: Dec 15, 2012
Working paper
M.V. Karasev. arxiv.org. math. Cornell University, 2014. No. 1404.1790v2.
For slow–fast quantum systems, we compute first corrections to the quantum action and to the effective slow Hamiltonian.
Added: Apr 9, 2014
Working paper
Alexander Zlotnik, Ilya Zlotnik. Working papers by Cornell University. Cornell University, 2016. No. 1609.07758.
We present direct logarithmically optimal in theory and fast in practice algorithms to implement the tensor product high order finite element method on multi-dimensional rectangular parallelepipeds for solving PDEs of the Poisson kind. They are based on the well-known Fourier approaches. The key new points are the fast direct and inverse FFT-based algorithms for expansion in eigenvectors of the 1D eigenvalue problems for the high order FEM. The algorithms can further be used for numerous applications, in particular, to implement the tensor product high order finite element methods for various time-dependent PDEs. Results of numerical experiments in 2D and 3D cases are presented.
Added: Sep 29, 2016