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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">653338</article-id><article-id pub-id-type="doi">10.31857/S042473880024867-2</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Recovering the actual trajectory of economic cycles</article-title><trans-title-group xml:lang="ru"><trans-title>Восстановление фактической траектории экономических циклов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Karmalita</surname><given-names>Viacheslav Alekseevich</given-names></name><name xml:lang="ru"><surname>Кармалита</surname><given-names>Вячеслав Алексеевич</given-names></name></name-alternatives><email>karmalita@videotron.ca</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Dr. Slava Karmalita, Consultant</institution></aff><aff><institution xml:lang="ru">Private consultant</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2023</year></pub-date><volume>59</volume><issue>2</issue><issue-title xml:lang="en">VOL 59, NO2 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 59, №2 (2023)</issue-title><fpage>19</fpage><lpage>25</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 ©; 2023, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Российская академия наук</copyright-statement><copyright-year>2023</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/653338">https://journals.eco-vector.com/0424-7388/article/view/653338</self-uri><abstract xml:lang="en"><p> </p> <p>The paper deals with the development of a method for restoring the trajectory of economic cycles from estimates of the gross domestic product (GDP). The proposed approach to solve this problem is based on the interpretation of cycles in the form of random oscillations of the income with a certain natural frequency, also called a narrowband random process. The operators (Fourier transforms, filtering, etc.) used to recover the cycle trajectory are linear. Their inherent associativity property allows changing the sequence of implementation of the linear operators above. As a result, it is proposed to start the recovery with bandpass filtering of the GDP function, and after that to parry the influence of the inertia property of the GDP estimator. Taking the qualities of a narrowband random process into consideration made it possible to create a simplified procedure to recover the cycle trajectory. In the example of the Kuznets swing, the acceptability of this procedure is demonstrated for the practical econometrics. The developed method is applicable in problems that require knowledge of the trajectory of the considered cycle.</p></abstract><trans-abstract xml:lang="ru"><p>Работа посвящена разработке метода восстановления значений экономических циклов по оценкам совокупного валового продукта (СВП). Предложенный подход к решению этой задачи базируется на интерпретации цикла в виде случайных колебаний функции доходов с некоторой собственной частотой, именуемых также узкополосным случайным процессом. Используемые при восстановлении траектории цикла операторы (преобразования Фурье, фильтрация и пр.) являются линейными, которым присуще свойство ассоциативности, позволяющее изменять их последовательность. Вследствие чего предложено начинать процедуру восстановления значений колебаний доходов с полосовой фильтрации функции СВП, а затем противодействовать эффекту инерционности оператора, формирующего оценки СВП. Учет особенностей узкополосного случайного процесса позволил создать упрощенную процедуру восстановления траектории цикла. На примере цикла Кузнеца показана ее приемлемость для задач практической эконометрики. Разработанный метод применим в задачах, требующих знания траектории рассматриваемого цикла.</p></trans-abstract><kwd-group xml:lang="en"><kwd>economic cycle</kwd><kwd>random oscillations</kwd><kwd>cycle trajectory</kwd><kwd>Fourier transforms</kwd><kwd>frequency response characteristics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>экономический цикл</kwd><kwd>случайные колебания</kwd><kwd>траектория цикла</kwd><kwd>преобразования Фурье</kwd><kwd>амплитудная и фазовая частотные характеристики</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>﻿Павлейно М.А., Ромаданов В.М. (2007). Спектральные преобразования в MATLAB. Учеб-но-методическое пособие. 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