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Скрининг в модели монополистической конкуренции для многопродуктовых фирм
С. 64–67.
Verbus V. A., Osharin A., Bakunina I. A.
A model of monopolistic competition for a closed economy, consisting of the traditional sector and the industrial production sector, which includes multi-product companies, is built. The consumption sector consists of heterogeneous consumers with a two-level Cobb-Douglas utility function and a generalized CES utility function built into it. The generalized CES utility function, unlike the standard one, includes, besides the love of variety, also the love of product quality, which makes it possible to distinguish consumers with a different attitude to product quality. The industrial sector consists of firms producing a variety of differentiated products of different quality, oriented to a specific type of customer. In the work, the demand functions of heterogeneous consumers for goods of different quality are obtained, the state of short-term equilibrium is considered for the case when firms have market power in choosing the quality of products. Various strategies of firms with respect to the selection of the optimal combination “price-quality” of a product that provides them with the maximum profit were analyzed, and conditions were obtained for screening in conditions of incomplete information on the type of consumers.
Slepov F., Kokovin S. G., Economic Theory 2025
We revisit Krugman’s (J Int Econ 9(4):469–479, 1979.) classical trade model in its general form with several asymmetric countries and unspecified additive utility functions. We present the weakest known conditions on utilities sufficient for the existence of equilibrium. These conditions are also necessary under symmetric preferences. Using the same method for Bertoletti and Etro’s (Econ ...
Added: May 5, 2025
Zolotareva A., Kostenko V., Lebedeva A. et al., Обозрение психиатрии и медицинской психологии им. В.М. Бехтерева 2024 Т. 58 № 2 С. 45–54
Summary. The Patient Health Questionnaire-4 (PHQ-4) is one of the most well-known and widely used instruments for assessing anxiety and depressive symptoms.
Objective. The aim of this study was to adapt the Russian-language version of the PHQ-4 in the general population.
Material and Methods. Data collection was carried out with the help of the service «Anketolog». The participants ...
Added: July 1, 2024
Limonov L. E., Batchaev A., Zaostrovtsev A. P. et al., М.: Юрайт, 2023.
Курс "Теория региональной экономики и пространственного развития" является частью базового курса "Региональная экономика и экономическая география", в которую включено рассмотрение теорий, моделей, методов региональной экономики и пространственного развития. В курсе подробно и системно освещены достижения пространственной экономики, включая новую экономическую географию и ее эмпирические приложения, рассмотрены модификации и приложения базовых макро- и микроэкономических теорий к ...
Added: February 1, 2024
Slepov Fedor, Kokovin S. G., / Series WP BRP "Basic research program". 2023. No. 262/EC/2023.
This paper develops a modeling technique of “attainable profit” functions, applying it to two models of monopolistic competition. First, it revisits the Krugman's classical trade model in the most general form: several asymmetric countries and non-specified additive utility functions. We establish the weakest conditions on utilities, sufficient for the existence of equilibria. These conditions are ...
Added: December 19, 2023
Sergey Kokovin, Pavel Molchanov, Bykadorov I., Journal of International Economics 2022 Vol. 137 Article 103595
We study the canonical Krugman (1979) trade model with non-CES preferences that yield autarky at finite trade costs. We prove a non-monotone impact of gradual trade liberalization. At first, near autarky, emerging trade reduces world welfare, while at free trade it becomes large enough to be beneficial (Krugman's result). This non-monotonicity persists under heterogenous firms. ...
Added: January 23, 2023
Zolotareva A., Культурно-историческая психология 2022 Т. 18 № 4 С. 38–46
f somatic symptoms [15]. The aim of this study was to standardize the Russian version of PHQ-15. The study included 1157 respondents from the general population aged 18 to 71. In addition to the PHQ-15, the participants completed the Russian Depression, Anxiety, and Stress Scales-21 (DASS-21), evaluating the psychological distress symptoms. The results showed that ...
Added: December 29, 2022
Goryunov M., Sergey Kokovin, Tabuchi T., Economic Theory 2021 Vol. 74 No. 3 P. 793–832
Our novel approach enriches the general additive monopolistic competition model with a space of product characteristics: consumers’ “ideal varieties”. This paper bridges two traditions in modelling markets with horizontal product differentiation: the Hotelling’s (Econ J 39(153):41–57, 1929) “address economy” and Chamberlinian Dixit–Stiglitz monopolistic competition. Unlike Hotelling, our partially localised competition involves intersecting zones of service among producers. ...
Added: November 18, 2021
Kokovin S. G., Vasilev F., Ural Mathematical Journal 2021 Vol. 7 No. 1 P. 66–80
Unlike standard models of monopolistic screening (second-degree price discrimination), we consider a situation where consumers are heterogeneous not only vertically, in their willingness to pay, but also horizontally, in their tastes or "addresses'' a la Hotelling's Linear City. For such a screening game, a novel model is composed. We formulate the game as an optimization program, prove the existence of ...
Added: November 18, 2021
Sheiman I., Shishkin S., Shevski V. et al., Мир России: Социология, этнология 2021 Т. 30 № 4 С. 6–29
Диспансеризации населения позиционируется российским государством как важнейший инструмент политики в сфере здравоохранения. В отчетах органов государственной власти рост охвата населения диспансеризацией и числа выявленных заболеваний представляются как однозначные свидетельства ее успеха. Перспективы ее развития связываются с расширением числа участников и состава мероприятий по выявлению заболеваний. Считается, что это автоматически приведет к улучшению показателей здоровья населения. ...
Added: October 18, 2021
Chermoshentsev E., Финансы и бизнес 2020 Т. 16 № 4 С. 97–110
We analyses strategic interactions among developers in Saint Petersburg and region. Despite strong theoretical evidences to be strategic market, there are no strategic interactions among firms, so the market exhibits monopolistic competition pattern. However, the situation is reversed after legislations changes that severs regulations and financial constraints for developer. Market now shows that prices are ...
Added: April 14, 2021
Rozanova N. M., Общественные науки и современность 2021 № 1 С. 63–72
Patterns for competitive and monopoly behaviour, market power configurations and instruments of interfirm relationships are under radical transformation in a digital era. There arise new forms of monopolistic strategies that aim at establishing, strengthening and withstanding long-term market power in various industries. Analysis of Russian and foreign economic investigations that was done in the article ...
Added: March 20, 2021
Vasily M. Goncharenko, Alexander B. Shapoval, Lipagina L., , in: Proceedings of the Conference on Modeling and Analysis of Complex Systems and Processes 2020 (MACSPro 2020)Vol. 2795.: CEUR Workshop Proceedings, 2020. P. 108–116.
We consider a general equilibrium model in a multisector economy with 𝑛 high-tech sectors where singleproduct firms compete monopolistically producing a differentiated good. Homogeneous sector is characterized by perfect competition. Workers attempt to find a job in high-tech sectors because of higher wages. However, it is possible for them to remain unemployed. Wages of employees ...
Added: January 13, 2021
Pospelov I. G., Radionov S., Advances in Systems Science and Applications 2020 Vol. 20 No. 2 P. 119–130
We present a natural generalization of the Dixit-Stiglitz monopolistic competition model (DSM) — we assume that there is a continuum of industries, each of them described as in DSM, and each characterized with its own elasticity of substitution. Although firms in all industries share the same level of productivity and costs, exogenous technological progress leads ...
Added: December 8, 2020
Matsuyama K., Ushchev P., / Series ISSN 0265-8003 "Centre for Economic Policy Research Discussion Paper Series". 2020. No. DP14991.
The Dixit-Stiglitz model of monopolistic competition with symmetric CES demand system with gross substitutes is widely used as a building block across many applied general equilibrium fields. Two of its remarkable features are the invariance of the markup rate and the optimality of the freeentry equilibrium. Of course, neither of these two features is robust. ...
Added: November 22, 2020
Matsuyama K., Ushchev P., / Series ISSN 0265-8003 "Centre for Economic Policy Research Discussion Paper Series". 2020. No. DP15475.
We propose and characterize parametric families of homothetic demand systems, which feature a constant pass-through rate that is common across otherwise heterogenous monopolistically competitive firms. These parametric families offer natural, flexible, and yet tractable extensions of CES. In the case of complete pass-through, the markup rate is constant, as in CES, yet it can be ...
Added: November 21, 2020
Behrens K., Murata Y., Mion G. et al., Quarterly Journal of Economics 2020 Vol. 135 No. 4 P. 2299–2360
Equilibria and optima generally differ in imperfectly competitive markets. Although this is well understood theoretically, it is unclear how large the welfare distortions are in the aggregate economy. Do they matter quantitatively? To answer this question, we develop a multisector monopolistic competition model with endogenous firm entry and selection, productivity, and markups. Using French and ...
Added: November 3, 2020
Osharin A., Valery Verbus, Irina Bakunina et al., Journal of Economic Structures 2020 Vol. 9 P. 1–12
The paper develops a two-country monopolistic competition model of trade featuring country-specifc consumer tastes. The accounting for heterogeneity in tastes is achieved by assuming diferent elasticities of substitution in the CES utility function for diferent country consumers. The proposed framework extends the canonical Krugman’s approach by revealing new efects regarding markups response to consumer heterogeneity ...
Added: October 10, 2020
A.Shapoval, V. M. Goncharenko, Journal of Economics 2020 Vol. 130 No. 2 P. 187–218
This paper offers a new theory that describes the influence of uncertainty on economic fundamentals. This theory posits that uncertainty can improve social welfare. We argue that in an economy, where spending of the customers for the differentiated good correlates with larger substitutability of its varieties, the equilibrium output decreases and the prices increase when uncertainty appears. Alternatively, if such ...
Added: March 2, 2020
Verbus V. A., Osharin A., Экономическая политика 2019 Т. 14 № 3 С. 152–175
The paper builds a two-sector monopolistic competition model featuring multi-product firms and heterogeneous consumers endowed with a Cobb–Douglas utility nesting a generalized CES function. In contrast to the standard CES, the generalized CES function includes both the love of variety and the love for product quality, which makes it possible to distinguish consumers differing in their ...
Added: October 24, 2019