National Research University – Higher School of Economics

About: National Research University – Higher School of Economics is a education organization based out in Moscow, Russia. It is known for research contribution in the topics: Population & Computer science. The organization has 12873 authors who have published 23376 publications receiving 256396 citations.

Instanton moduli spaces and bases in coset conformal field theory

Abstract: Recently proposed relation between conformal field theories in two dimensions and supersymmetric gauge theories in four dimensions predicts the existence of the distinguished basis in the space of local fields in CFT. This basis has a number of remarkable properties, one of them is the complete factorization of the coefficients of the operator product expansion. We consider a particular case of the U(r) gauge theory on C^2/Z_p which corresponds to a certain coset conformal field theory and describe the properties of this basis. We argue that in the case p=2, r=2 there exist different bases. We give an explicit construction of one of them. For another basis we propose the formula for matrix elements.

Fair Division in the Internet Age

Abstract: Fair division, a key concern in the design of many social institutions, has for 70 years been the subject of interdisciplinary research at the interface of mathematics, economics, and game theory. ...

Investment-cash flow sensitivity and financial constraints: Evidence from unquoted European SMEs

Abstract: We contribute to the financial constraints literature and the investment-cash flow sensitivity debate by defining a new and simple index of firm level financial constraints for unquoted European SMEs. Firms that are constrained according to our index pay higher interest rates on their debt. An exogenous financial supply shock reveals that our index also captures financial constraints in terms of the volume of credit. Our index outperforms existing indices in capturing financial constraints of unquoted SMEs. Finally, employing our proposed index to identify financially constrained firms and using firm-level employment growth as a control for investment opportunities, we find that constrained firms display the highest investment-cash flow sensitivities.

Authoritarian and Democratic Diffusion in Post-Communist Regions:

Abstract: There is a rich body of theorizing on the diffusion of democracy across space and time. There is also an emerging scholarship on authoritarian diffusion. The dynamics of the interaction between external democratic and autocratic diffusion processes and their effects on national and sub-national political regime outcomes have received scant attention in the literature. Do democratic diffusion processes help counter external authoritarian influences? And, in contexts where external diffusion of democratic influences is weak, do we observe greater susceptibility to diffusion from regional autocracies that might in turn reinforce authoritarian practices and institutions in “recipient” states? To address these questions, we perform analysis of data from two original under-utilized data sets—a data set on the European Union (EU) aid to Russia’s regions and a data set with statistics on trade among post-Soviet states. We find that EU aid has the effect of countering external authoritarian influences that work th...