Inter-Firm Non-Monetary Transactions in Russia: A Literature Review

This paper provides a comprehensive literature review of the use of non- monetary transactions (barter, debt offsets, etc.) in Russia since the fall of Communism. The two primary theories are the credit crunch (liquidity constraint) theory and the virtual economy theory. The former relates to the lack of access to bank credit and cash and the rise of non-monetary transactions as a survival mechanism that oils the gears of the market. The latter asserts that barter is a symptom of a system by which the value added firms (such as Gasprom) subsidize the value destroying firms (the 'white elephants'). Barter allows the two players to arbitrarily set prices so that the value added firm can avoid some of the profit taxes while the value destroying firms can stay alive.barter, non-monetary, Russia, demonetization, transition

Analyzing the Performance of Lock-Free Data Structures: A Conflict-based Model

This paper considers the modeling and the analysis of the performance of lock-free concurrent data structures. Lock-free designs employ an optimistic conflict control mechanism, allowing several processes to access the shared data object at the same time. They guarantee that at least one concurrent operation finishes in a finite number of its own steps regardless of the state of the operations. Our analysis considers such lock-free data structures that can be represented as linear combinations of fixed size retry loops. Our main contribution is a new way of modeling and analyzing a general class of lock-free algorithms, achieving predictions of throughput that are close to what we observe in practice. We emphasize two kinds of conflicts that shape the performance: (i) hardware conflicts, due to concurrent calls to atomic primitives; (ii) logical conflicts, caused by simultaneous operations on the shared data structure. We show how to deal with these hardware and logical conflicts separately, and how to combine them, so as to calculate the throughput of lock-free algorithms. We propose also a common framework that enables a fair comparison between lock-free implementations by covering the whole contention domain, together with a better understanding of the performance impacting factors. This part of our analysis comes with a method for calculating a good back-off strategy to finely tune the performance of a lock-free algorithm. Our experimental results, based on a set of widely used concurrent data structures and on abstract lock-free designs, show that our analysis follows closely the actual code behavior.Comment: Short version to appear in DISC'1

Ownership and Firm Performance: Evidence from 25 Countries in Central and Eastern Europe and the Former Soviet Union

Using the joint World Bank and EBRD Business Environment and Enterprise Performance Survey (BEEPS), compiled in 1999, this paper explores the relationship between firm performance and ownership in Central and Eastern Europe (CEE) and the Former Soviet Union (FSU). The literature on privatization and performance has been largely inconclusive, especially now that sample selection bias is taken into account. This paper provides evidence that foreign owned firms perform the best, performing significantly better than state owned enterprises, while firms whose owners are domestic outside companies or individuals also perform better than state owned enterprises but the result is somewhat sensitive to the specification of the model. The more significant, albeit puzzling result, is that insider owned firms perform worse than state owned firms. This result is not significant when looking at manager and worker owned firms separately. In further work, I will explore the determinants of this puzzling result.transition, privatization, ownership, firm performance

Massive Splenic Pseudocysts : Report of 2 cases

Splenic cysts can be classified as parasitic and nonparasitic. Non parasitic cysts can be further divided into true and pseudocysts. Pseudocysts of spleen does not contain an epithelial lining. Pseudocysts of spleen are usually post traumatic and they rarely grow to a large size and most of them are asymptomatic. It can be confused with cystic lesions of spleen or pancreas or from the surrounding structures. These cases require exploration and is both diagnostic and therapeutic. Conservative measures to preserve spleen can be considered only in presence of expertise and if remnant functional splenic parenchyma is more than 25 %. Here we present two cases of giant pseudocysts who were confused with malignancy and referred to our centre and were later found to be pseudocysts of spleen. We would like to report these cases as they are rare and as diagnostic dilemmas

Mexique : les producteurs de café gèrent leurs usines. II. Résultats économiques et perspectives

Depuis plusieurs années, dans la région de Xalapa (Veracruz), des groupements de producteurs ont pris en charge la transformation des cerises en café parche. Durant la campagne 1992-93, les cours médiocres et irréguliers du café parche, imparfaitement intégrés dans la gestion quotidienne des bénéficios, n'ont pas permis l'obtention de résultats très satisfaisants. La survie et peut-être le développement des groupements passent par 3 nouveaux objectifs : la consolidation des acquis organisationnels et l'amélioration de la gestion; la rationalisation du procédé de transformation; la recherche de débouchés rémunérateurs pour la valorisation des lots de qualit