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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Economics and Mathematical Methods</journal-id><journal-title-group><journal-title xml:lang="en">Economics and Mathematical Methods</journal-title><trans-title-group xml:lang="ru"><trans-title>Экономика и математические методы</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0424-7388</issn><issn publication-format="electronic">3034-6177</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">653314</article-id><article-id pub-id-type="doi">10.31857/S0424738824010078</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Industrial problems</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Отраслевые проблемы</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Electricity spot price dynamics comparison in the European and Siberian price zones of Russia using a stochastic volatility model</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнение динамики спотовых цен на электричество в европейской и сибирской ценовых зонах России в модели стохастической волатильности</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kasianova</surname><given-names>K. A.</given-names></name><name xml:lang="ru"><surname>Касьянова</surname><given-names>К. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kasyanova-ka@ranepa.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian Presidential Academy of National Economy and Public Administration</institution></aff><aff><institution xml:lang="ru">РАНХиГС</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-07-03" publication-format="electronic"><day>03</day><month>07</month><year>2024</year></pub-date><volume>60</volume><issue>1</issue><fpage>85</fpage><lpage>96</lpage><history><date date-type="received" iso-8601-date="2025-02-03"><day>03</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0424-7388/article/view/653314">https://journals.eco-vector.com/0424-7388/article/view/653314</self-uri><abstract xml:lang="en"><p>In the literature on forecasting electricity spot prices, it is noted that the empirical distribution of the growth rates of equilibrium prices for electricity is characterized by the presence of heavy ‘tails’, so they can be described as a jump-diffusion process. However, electricity prices are associated with a variety of observable factors that can be included in the model. Within the framework of this article, a flexible model, that allows taking into account statistical features of electricity prices (multilevel seasonality, stochastic volatility), as well as fundamental price factors that directly or indirectly affect equilibrium price indices (weather factors, resource prices, industrial production index, or IPI), was developed. Using methods of Bayesian inference, it was shown that the developed two-level specification of the stochastic volatility model, which separates the factors influencing the deterministic and stochastic components of the series, fits the data best, among the considered alternatives. As a result, differences in the price dynamics between the European and Siberian price zones were revealed: the influence of the weather factor in the price zones is not the same; there are also differences in the weekly price dynamics and the effect of holidays. The effect of low-frequency economic factors (resource prices, IPI) on prices was not revealed. This model is a useful tool for analyzing short-term and long-term electricity price dynamics, building scenario forecasts, and it also can potentially be used in risk-management and electricity derivatives pricing.</p></abstract><trans-abstract xml:lang="ru"><p>В литературе о прогнозировании спотовых цен на электричество отмечается, что эмпирическое распределение темпов роста равновесных цен на электричество отличается наличием тяжелых «хвостов», поэтому их можно описать как диффузионно-скачкообразный процесс. При этом цены на электричество связаны со множеством наблюдаемых факторов, которые могут быть учтены в модели. Разработана модель, позволяющая учесть статистические особенности цен на электричество (наличие многоуровневой сезонности, стохастическую волатильность) и фундаментальные ценовые факторы, прямо или косвенно влияющие на равновесные индексы цен (погода, цены на ресурсы, индекс промышленного производства). С помощью байесовского анализа было показано, что среди рассмотренных альтернатив разработанная двухуровневая спецификация модели стохастической волатильности, разделяющая факторы, влияющие на детерминистическую и стохастическую компоненты ряда, наилучшим образом описывает данные. В результате анализа были выявлены различия в динамике цен в европейской и сибирской ценовых зонах: влияние погоды в ценовых зонах неодинаковое, имеются различия в недельной динамике цен и влиянии праздничных дней. Эффект низкочастотных экономических факторов (цен на ресурсы, индекса промышленного производства) на цены не был выявлен. Данная модель является полезным инструментом для анализа краткосрочной и долгосрочной динамики цен на электричество, построения сценарных прогнозов, а также потенциально может использоваться в управлении рисками и при ценообразовании производных финансовых инструментов на рынке электроэнергии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>electricity spot prices</kwd><kwd>day ahead market</kwd><kwd>Bayesian inference</kwd><kwd>stochastic volatility model</kwd><kwd>trend-seasonal decomposition</kwd><kwd>time series analysis</kwd><kwd>linear trend</kwd><kwd>Fourier series</kwd><kwd>Bayes factor</kwd><kwd>effective sample size</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>спотовые цены на электроэнергию</kwd><kwd>рынок на сутки вперед</kwd><kwd>байесовский вывод</kwd><kwd>модель стохастической волатильности</kwd><kwd>тренд-сезонное разложение</kwd><kwd>анализ временных рядов</kwd><kwd>линейный тренд</kwd><kwd>ряды Фурье</kwd><kwd>коэффициент Байеса</kwd><kwd>эффективный размер выборки</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Калашникова С., Ермишина А. 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