?
Inverse problems in Pareto’s demand theory and their applications to analysis of stock market crises
Journal of Inverse and Ill-posed problems. 2016. Vol. 26. No. 1. P. 95–108.
Klemashev N., Shananin A. A., Zhang S.
We develop an approach to analysis of stock market crises based on the generalized nonparametric method. The generalized nonparametric method is based on solvability and regularization of ill-posed inverse problem in Pareto's demand theory. Our approach allows one to select a few companies that may be considered as the main reason for the crisis. We apply this approach to study the Chinese stock market crash in 2015.
Language:
English
Астафьева Е.В., Турунцева М. Ю., Экономический журнал Высшей школы экономики 2021 Т. 25 № 1 С. 65–101
В основе принятия своевременных экономико-политических решений и бизнес-планирования лежит мониторинг текущей ситуации и прогнозирование путей развития экономической активности, базу которых составляют официальные статистические оценки значений различных показателей. В этой связи переоценка данных и прогнозы, основанные на более ранних либо поздних оценках, потенциально могут повлечь за собой совершенно различные экономико-политические решения. Согласно официальной методике Росстата, публикуется ...
Added: August 21, 2026
Астафьева Е., Турунцева М., Научный вестник ИЭП им. Гайдара.ру (электронный журнал) 2022 № 7 С. 32–35
В статье приводятся результаты анализа качественных свойств прогнозов некоторых показателей, ежемесячно публикуемых Институтом экономической политики имени. Е.Т. Гайдара в «Научном вестнике ИЭП им. Гайдара.ру» (далее – «прогнозы ИЭП»). Мы рассматриваем простейшие статистики (MAPE, MAE, RMSE) как прогнозов ИЭП, так и альтернативных прогнозов (наивных, наивных сезонных и прогнозов, построенных с использованием скользящего среднего). Помимо сравнительного анализа на основе ...
Added: August 21, 2026
Астафьева Е., Турунцева М., Научный вестник ИЭП им. Гайдара.ру (электронный журнал) 2021 № 7 С. 32–35
В статье приводятся результаты анализа качественных свойств прогнозов некоторых показателей, ежемесячно публикуемых Институтом экономической политики имени. Е.Т. Гайдара в «Научном вестнике ИЭП им. Гайдара.ру» (далее – «прогнозы ИЭП»). Мы рассматриваем простейшие статистики (MAPE, MAE, RMSE) как прогнозов ИЭП, так и альтернативных прогнозов (наивных, наивных сезонных и прогнозов, построенных с использованием скользящего среднего). Помимо сравнительного анализа на основе ...
Added: August 21, 2026
Астафьева Е., Турунцева М., Научный вестник ИЭП им. Гайдара.ру (электронный журнал) 2021 № 1 С. 32–35
В статье приводятся результаты анализа качественных свойств прогнозов некоторых показателей, ежемесячно публикуемых Институтом экономической политики имени. Е.Т. Гайдара в «Научном вестнике ИЭП им. Гайдара.ру» (далее – «прогнозы ИЭП»). Мы рассматриваем простейшие статистики (MAPE, MAE, RMSE) как прогнозов ИЭП, так и альтернативных прогнозов (наивных, наивных сезонных и прогнозов, построенных с использованием скользящего среднего). Помимо сравнительного анализа на основе ...
Added: August 21, 2026
Астафьева Е.В., Турунцева М. Ю., Прикладная эконометрика 2024 Т. 74 № 2 С. 78–103
Комбинирование прогнозов считается наиболее простым способом улучшения каче‑ ства прогнозирования по сравнению с индивидуальными моделями. В данной работе проверяются возможности простейших методов комбинирования, таких как простое среднее и оценки на основе среднеквадратической ошибки прогнозов предыдущих пери‑ одов, для улучшения качественных характеристик краткосрочных прогнозов пяти по‑ казателей цен на ресурсы (нефть и металлы). В основе работы ...
Added: August 21, 2026
Астафьева Е.В., Турунцева М. Ю., Вестник Евразийской науки 2025 Т. 17 № 6
В работе исследуются возможности использования простых процедур корректировки и объединения прогнозов. Мы оцениваем влияние применения этих процедур (методов простой корректировки, простых и регрессионных методов комбинирования) на качество прогнозов показателей российского экспорта во все страны и импорта из всех стран. В общей сложности мы использовали четыре метода корректировки, 9 методов простого комбинирования и семь регрессионных методов. ...
Added: August 21, 2026
Лукьяненко Д. В., Ragimova A., Мухорина А. et al., European Physical Journal: Special Topics 2026 P. 1–24
Electronic health records (EHRs) contain vast volumes of clinical information that encode complex relationships between diseases. Traditional approaches to the analysis of interrelated or co-occurring diseases have focused on pairwise associations between diagnoses, missing the higher-order structures that characterise multimorbid patients. The present paper offers a narrative review of existing statistical, machine-learning, and artificial intelligence ...
Added: August 20, 2026
Chernov A., European Journal of Mathematics 2026 Vol. 12 Article 48
An induced additive action on a projective variety is a regular action of the group G_a^n on X in P^n with an open orbit that can be extended to a regular action on P^n. Such actions are known to correspond to pairs (A, U), where A is a local algebra and U is a generating subspace lying in the maximal ideal. This paper ...
Added: August 19, 2026
Matveeva N., Yudkevich M., Higher Education 2026 P. 1–20
This study draws on neo-institutional theory and the convergence/divergence debate in higher education research to examine whether public and private universities in EU candidate countries converge or diverge in their research activity and collaboration patterns. We analyse Scopus-indexed publication data for 43 universities across Albania, Bosnia and Herzegovina, Georgia, North Macedonia and Serbia for the ...
Added: August 19, 2026
Biryukova O. V., Barzunov D., Pautov A., Проблемы Дальнего Востока 2026 № 4
The formation of new transcontinental transport arteries intensifies geoeconomic competition in Eurasia and requires the development of sustainable models of investment cooperation. The Chinese Belt and Road Initiative and the International North—South Transport Corridor represent distinct institutional concepts for infrastructure financing, differing in their sources of capital, degree of centralization, and mechanisms of risk allocation. ...
Added: August 19, 2026
IEEE Advancing Technology for Humanity, 2025.
Dynamics of Systems, Mechanisms and Machines (Dynamics) ...
Added: August 19, 2026
Vlasenko D., Saranskaia I., Zakharov D., European Physical Journal: Special Topics 2026 P. 1–16
Hypergraphs provide a natural framework for representing neurophysiological interactions distributed across sets of sensors. A key methodological question is how hyperedges should be defined from frequency-resolved electroencephalography/magnetoencephalography (EEG/MEG) data. We demonstrate a construction strategy in which hyperedges are obtained from canonical coherence (caCOH), an extension of coherence that estimates coupling between multidimensional signal spaces. To ...
Added: August 18, 2026
Gaete Sepulveda M. A., Navarra: Eunsa, 2026.
Toward the Fifth-Generation University (5GU) is a work that proposes a transformative governance framework for institutions of higher education, capable of addressing the challenges of sustainability, digital reflexivity, and co-creation with multiple stakeholders. Drawing on a historical overview from University 1.0—focused on the preservation of knowledge—to University 5.0, the text presents a model centered on ...
Added: August 18, 2026
Borisov D., Katzarkov Ludmil, Sheshmani A. et al., American Journal of Mathematics 2026 Vol. 148 No. 4 P. 1075–1101
It is shown that there are globally defined Lagrangian distributions on the stable loci of derived \mathrm{Quot}-stacks of coherent sheaves on Calabi--Yau four-folds. Dividing by these distributions produces perfectly obstructed smooth stacks with globally defined -1-shifted potentials, whose derived critical loci give back the stable loci of smooth stacks of sheaves in global Darboux form. ...
Added: August 18, 2026
Lysenok N., International Journal of Computer Information Systems and Industrial Management Applications 2026 Vol. 18 No. 17s P. 533–549
This paper asks which families of volatility forecasting models create economic value in active trading, and through which integration channel that value is transmitted. Seven models drawn from four families — econometric (GJR-GARCH, HAR-J), gradient boosting (XGBoost, LightGBM), recurrent neural networks (LSTM, GRU) and a hybrid combining HAR-J with boosting — are compared on the ...
Added: August 18, 2026
Alena Bernyukevich, / Series WP BRP "Basic research program". 2025.
This essay explores the complex issue of determining the appropriate level of risk when implementing innovations within organizations. While innovation is widely recognized as a cornerstone of competitiveness, growth, and sustainability, excessive or poorly managed risk can lead to significant challenges. The discussion highlights key factors influencing acceptable risk levels, including alignment with corporate goals, ...
Added: August 17, 2026
Shaposhnikov S., Asia and Africa today 2025
Digital transformation of small and medium enterprises (SMEs) in India is critical to enhancing competitiveness and improving economic performance. It also helps address unemployment and regional inequality. However, SMEs face financial constraints, a digital skills shortage, resistance to change, and cybersecurity challenges. The authors analyze the impact of government initiatives such as Digital India, CGTMSE, ...
Added: August 14, 2026
Богатырев А. Б., Математический сборник 2023 Т. 214 № 3 С. 106–119
Рассматривается клеточное разбиение пространства модулей вещественных кривых рода 2 с отмеченной точкой на единственном вещественном овале. Клетки перечисляются определенными графами, веса которых описывают комплексную структуру на кривой. Показано, что стягивание ребра графа приводит к корневой особенности естественного отображения из весов графа в пространство модулей кривых. ...
Added: August 14, 2026
Zhuravleva T., Afanasev K., Engelmann J. et al., / Series "SSRN Working Paper Series". 2026.
Extortionary ("harassment") bribery can persist even when widely condemned, consistent with a coordination problem sustained by beliefs about what others do and what others consider acceptable. We study whether a minimal institutional featurethe presence of a third-party monitor empowered to punish-shifts (i) normative expectations about extortion and compliance and (ii) empirical expectations about their prevalence. ...
Added: July 22, 2026
Loubenets E. R., / Series arxiv.org "quant-ph". 2026. No. 2607.18050.
In many quantum applications it is important to know whether or not a Bell nonlocal two-qudit state exhibits its nonlocality under correlation scenarios with some given numbers S1,S2≥1 of generalized quantum measurements at two sites. In the present article, we find analytically a new general locality condition sufficient for a nonseparable Werner state with a ...
Added: July 21, 2026
Bolbachan V., / Series math "arxiv.org". 2024.
Chow polylogarithms are some special functions arising in explicit description of the Beilinson regulator map. The most interesting functional equation for this function reflects its vanishing on the boundary in the Bloch's cycle complex. We show that this functional equation formally follows from more simple ones, namely skew-symmetry, functoriality and multiplicativity.
To prove this, we study ...
Added: July 16, 2026
Bolbachan V., / Series math "arxiv.org". 2024.
Let K be a field of characteristic zero. We prove that its motivic cohomology in degree m−1 and weight m is rationally isomorphic to the cohomology of the polylogarithmic complex. This gives a partial extension of A. Suslin theorem describing the indecomposable K3 of a field. ...
Added: July 16, 2026
Panov V., Ryabchenko A., / Series arXiv "stat.ME". 2026. No. 2607.05048.
This paper investigates the problem of statistical inference for a mixture distribution consisting of a discrete and a continuous component, with a particular focus on the class of rational-infinitely divisible distributions. We consider non-parametric estimation of both components of the mixture as well as the quasi-L{é}vy measure, assuming that the mixture belongs to the class ...
Added: July 9, 2026
Mishin A., Guerrieri L., Kim J., / Series 2026-042 "Finance and Economics Discussion Series (FEDS)". 2026.
Within narrowly defined industries, the most productive firms produce far more than the least productive from the same inputs, and this dispersion widens in downturns. We build a tractable representative-agent model in which financial frictions—adverse selection and moral hazard—make firms sort endogenously into lenders, strategic defaulters, and producers. As credit conditions vary, the resulting misallocation ...
Added: June 28, 2026