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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2022-23-4-115-125</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1380</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Метод приближённого решения системы дифференциальных уравнений из модели Рамсея — Касса — Купманса, основанный на решении в квадратурах одного подкласса сходных систем</article-title><trans-title-group xml:lang="en"><trans-title>The method of approximate solution of a system of differential equations from the Ramsey–Kass–Koopmans model, based on the solution in quadratures of one subclass of similar systems</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козко</surname><given-names>Артем Иванович</given-names></name><name name-style="western" xml:lang="en"><surname>Kozko</surname><given-names>Artem Ivanovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical and mathematical sciences</p></bio><email xlink:type="simple">prozerpi@yahoo.co.uk</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лужина</surname><given-names>Любовь Михайловна</given-names></name><name name-style="western" xml:lang="en"><surname>Luzhina</surname><given-names>Lyubov Mihailovna</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical and mathematical sciences</p></bio><email xlink:type="simple">lluzhina@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Попов</surname><given-names>Антон Юрьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>Anton Yurievich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences</p></bio><email xlink:type="simple">prozerpi@yahoo.co.uk</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чирский</surname><given-names>Владимир Григорьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Chirskii</surname><given-names>Vladimir Grirorevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences</p></bio><email xlink:type="simple">vgchirskii@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov MoscowState University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Московский государственный университет им. М. В. Ломоносова; Российская академия народного хозяйства и государственной службы при Президенте Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University; Russian Presidential Academy of National Economy and Public Administration</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>16</day><month>01</month><year>2023</year></pub-date><volume>23</volume><issue>4</issue><fpage>115</fpage><lpage>125</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Козко А.И., Лужина Л.М., Попов А.Ю., Чирский В.Г., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Козко А.И., Лужина Л.М., Попов А.Ю., Чирский В.Г.</copyright-holder><copyright-holder xml:lang="en">Kozko A.I., Luzhina L.M., Popov A.Y., Chirskii V.G.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.chebsbornik.ru/jour/article/view/1380">https://www.chebsbornik.ru/jour/article/view/1380</self-uri><abstract><p>В статье исследуется модель Рамсея — Касса — Купманса. Мы рассматриваем вспомогательную систему дифференциальных уравнений, которая аналогична системе, возникающей в случае постоянства стационарной нормы сбереженияю. Нами обнаружено, что системы этого класса решаются в квадратура. Это позволяет найти приближенные решения системы, описывающую исходную модель.</p></abstract><trans-abstract xml:lang="en"><p>The article is devoted to the Ramsey–Kass–Koopmans model. We consider an auxiliary system of differential equations, which is analogous to the system that arises in the case of constancy of the stationary rate of savings. We found that systems of this class are solved in quadrature. This allows us to find approximate solutions to the system describing the original model.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>математическая модель</kwd><kwd>задача Рамсея — Касса — Купманса</kwd><kwd>конку- рентные домохозяйства</kwd><kwd>стационарная нормы сбережения.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mathematical model</kwd><kwd>Ramsey–Kass–Koopmans problem</kwd><kwd>competitive households</kwd><kwd>stationary savings rate.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа первого автора выполнена при поддержке РФФИ (проект 19-01-00332-a).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Acemoglu Daron. The Neoclassical Growth Model. Introduction to Modern Economic Growth</mixed-citation><mixed-citation xml:lang="en">Acemoglu, Daron. 2009, “The Neoclassical Growth Model. Introduction to Modern Economic</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">// Princeton: Princeton University Press. 2009. pp. 287–326. ISBN 978-0-691-13292-1.</mixed-citation><mixed-citation xml:lang="en">Growth“, Princeton: Princeton University Press. pp. 287–326. ISBN 978-0-691-13292-1.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">B´enassy Jean-Pascal. The Ramsey Model. Macroeconomic Theory // New York: Oxford</mixed-citation><mixed-citation xml:lang="en">B´enassy, Jean-Pascal. 2011, “The Ramsey Model. Macroeconomic Theory“, New York: Oxford</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">University Press. 2011. P. 145–160. ISBN 978-0-19-538771-1.</mixed-citation><mixed-citation xml:lang="en">University Press. pp. 145–160. ISBN 978-0-19-538771-1.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Козко А.И., Лужина Л.М., Попов А.Ю., Чирский В.Г. Оптимальная экспонента в задаче</mixed-citation><mixed-citation xml:lang="en">Kozko A.I., Luzhina L.M., Popov A.Yu., Chirskii V.G. 2019, “Optimal exponent in</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Рамсея — Касса — Купманса с логарифмической функцией полезности // Чебышевский</mixed-citation><mixed-citation xml:lang="en">the Ramsey–Kass–Koopmans problem with logarithmic utility function“, Chebyshevskii</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">сборник. 2019;20(4):197-207. https://doi.org/10.22405/2226-8383-2018-20-4-197-207.</mixed-citation><mixed-citation xml:lang="en">Sbornik. vol. 20(4), September. pp. 197-207. (In Russ.) https://doi.org/10.22405/</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Козко А.И., Лужина Л.М., Попов А.Ю., Чирский В.Г. О задаче Рамсея — Касса — Куп-</mixed-citation><mixed-citation xml:lang="en">-8383-2018-20-4-197-207</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">манса для потребительского выбора // Итоги науки и техники. Современная математика</mixed-citation><mixed-citation xml:lang="en">Kozko, A. I., Luzhina, L. M., Popov, A. Yu., Chirskii, V. G. 2020, “On the Ramsey–</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">и ее приложения. Тематические обзоры. 2020. Том 182. С. 39–44. DOI: 10.36535/0233-6723-</mixed-citation><mixed-citation xml:lang="en">Kass–Koopmans problem for consumer choice“, Results of science and technology. Modern</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">-182-39-44</mixed-citation><mixed-citation xml:lang="en">mathematics and its applications. Thematic review. vol. 182, September, pp. 39-44. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Козко А.И., Лужина Л.М., Попов А.Ю., Чирский В.Г. Модель задачи Рамсея — Кас-</mixed-citation><mixed-citation xml:lang="en">DOI: 10.36535/0233-6723-2020-182-39-44.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">са — Купманса // Издательство: Московский педагогический государственный универси-</mixed-citation><mixed-citation xml:lang="en">Kozko, A. I., Luzhina, L. M., Popov, A. Yu., Chirskii, V. G. 2019, The model of the problem</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">тет (Москва). Классическая и современная геометрия, материалы международной конфе-</mixed-citation><mixed-citation xml:lang="en">Ramsey–Kass–Koopmans // Moscow state pedagogical University (Moscow). Classical and</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">ренции, посвященной 100-летию со дня рождения В. Т. Базылева. под ред. А. В. Царева.</mixed-citation><mixed-citation xml:lang="en">modern geometry, materials of the international conference dedicated to the 100th anniversary</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Москва. 2019. C. 87-88.</mixed-citation><mixed-citation xml:lang="en">of V. T. Bazylev. under the editorship of A. V. Tsarev. Moscow. pp. 87-88.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Козко А.И., Лужина Л.М., Попов А.Ю., Чирский В.Г. Оценка необходимого начального</mixed-citation><mixed-citation xml:lang="en">Kozko A.I., Luzhina L.M., Popov A.Yu., Chirskii V.G. 2019, “Assessment of the necessary</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">экономического ресурса в задаче Рамсея–Касса–Купманса // Чебышевский сборник. 2019.</mixed-citation><mixed-citation xml:lang="en">initial economic resource in the Ramsey–Kass–Koopmans problem“, Chebyshevskii</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Vol 20(4), C. 188-196. https://doi.org/10.22405/2226-8383-2018-20-4-188-196.</mixed-citation><mixed-citation xml:lang="en">Sbornik. vol. 20(4), September, pp. 188-196. (In Russ.) https://doi.org/10.22405/</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Козко А.И., Лужина Л.М., Попов А.Ю., Чирский В.Г. Функция потребления в модели</mixed-citation><mixed-citation xml:lang="en">-8383-2018-20-4-188-196.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">экономического роста Рамсея — Касса — Купманса в случае стационарности функции</mixed-citation><mixed-citation xml:lang="en">Kozko A.I., Luzhina L.M., Popov A.Yu., Chirskii V.G. 2022, “The consumption function in the</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">сбережения // Чебышевский сборник. 2022. Vol 23(1), C. 118-129. https://doi.org/10.</mixed-citation><mixed-citation xml:lang="en">Ramsey–Kass–Koopmans economic growth model in the case of a stationary saving function“,</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">/2226-8383-2022-23-1-118-129.</mixed-citation><mixed-citation xml:lang="en">Chebyshevskii Sbornik. vol. 23(1), September, pp. 118-129. (In Russ.) https://doi.org/10.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Rahul Giri. Growth Model with Endogenous Savings: Ramsey–Cass–Koopmans Model.</mixed-citation><mixed-citation xml:lang="en">/2226-8383-2018-20-4-188-196.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">http://ciep.itam.mx/~{}rahul.giri/uploads/1/1/3/6/113608/ramsey-cass-koopmans</mixed-citation><mixed-citation xml:lang="en">Rahul, Giri. “Growth Model with Endogenous Savings: Ramsey–Cass–Koopmans Model“, 2018,</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">_model.pdf.</mixed-citation><mixed-citation xml:lang="en">http://ciep.itam.mx/\~{}rahul.giri/uploads/1/1/3/6/113608/ramsey-cass-koopmans\</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Барро Р. Дж., Сала-и-Мартин Х. Экономический рост // М.: БИНОМ. Лаборатория зна-</mixed-citation><mixed-citation xml:lang="en">_model.pdf.</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">ний. 2010.</mixed-citation><mixed-citation xml:lang="en">Barro, Robert J., Sala-i-Martin, Xavier. 2003, “Economic growth (2nd ed.)“, Massachusetts:</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Groth Christian and Koch Karl-Josef and Steger Thomas Michael. Rethinking the Concept of</mixed-citation><mixed-citation xml:lang="en">MIT Press, ISBN 9780262025539.</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Long-Run Economic Growth (April 2006) // CESifo Working Paper Series No. 1701. Available</mixed-citation><mixed-citation xml:lang="en">Groth, Christian and Koch, Karl-Josef and Steger, Thomas Michael. 2006, “Rethinking the</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">at SSRN: https://ssrn.com/abstract=899250.</mixed-citation><mixed-citation xml:lang="en">Concept of Long-Run Economic Growth (April 2006)“, CESifo Working Paper Series, no. 1701.</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">Groth Christian, Koch Karl-Josef, Steger Thomas Michael. When Economic Growth is Less</mixed-citation><mixed-citation xml:lang="en">Available at SSRN: https://ssrn.com/abstract=899250.</mixed-citation></citation-alternatives></ref><ref id="cit33"><label>33</label><citation-alternatives><mixed-citation xml:lang="ru">than Exponential // Economic Theory. Vol. 44, No. 2, 2010.</mixed-citation><mixed-citation xml:lang="en">Groth, Christian and Koch, Karl-Josef and Steger, Thomas Michael. 2010, “When Economic</mixed-citation></citation-alternatives></ref><ref id="cit34"><label>34</label><citation-alternatives><mixed-citation xml:lang="ru">Groth C. Chapter 10: The Ramsey Model // Available at: http://web.econ.ku.dk/okocg/</mixed-citation><mixed-citation xml:lang="en">Growth is Less than Exponential“, Economic Theory, vol. 44, no. 2, pp. 213-242.</mixed-citation></citation-alternatives></ref><ref id="cit35"><label>35</label><citation-alternatives><mixed-citation xml:lang="ru">VV/VV-2010/Lecture%20notes/Ch7-2010-1.pdf, 2010.</mixed-citation><mixed-citation xml:lang="en">Groth, C. 2010, “Chapter 10: The Ramsey Model“, Available at: http://web.econ.ku.dk/</mixed-citation></citation-alternatives></ref><ref id="cit36"><label>36</label><citation-alternatives><mixed-citation xml:lang="ru">Romer D. Advanced Macroeconomics. 3rd ed. // New York: McGraw-Hill/Irwin. 2006. P. 651.</mixed-citation><mixed-citation xml:lang="en">okocg/VV/VV-2010/Lecture\%20notes/Ch7-2010-1.pdf.</mixed-citation></citation-alternatives></ref><ref id="cit37"><label>37</label><citation-alternatives><mixed-citation xml:lang="ru">Robert J. Barro. Ramsey Meets Laibson in the Neoclassical Growth Model // The Quarterly</mixed-citation><mixed-citation xml:lang="en">Romer, D. 2006, “Advanced Macroeconomics. 3rd ed“, New York: McGraw-Hill/Irwin, pp. 651.</mixed-citation></citation-alternatives></ref><ref id="cit38"><label>38</label><citation-alternatives><mixed-citation xml:lang="ru">Journal of Economics, Oxford University Press. 1999. Vol. 114, No 4. P. 1125-1152.</mixed-citation><mixed-citation xml:lang="en">Robert J. Barro. 1999, “Ramsey Meets Laibson in the Neoclassical Growth Model“, The</mixed-citation></citation-alternatives></ref><ref id="cit39"><label>39</label><citation-alternatives><mixed-citation xml:lang="ru">King Robert G., and Sergio Rebelo. Transitional Dynamics and Economic Growth in the</mixed-citation><mixed-citation xml:lang="en">Quarterly Journal of Economics, Oxford University Press, vol. 114, no. 4, pp. 1125-1152.</mixed-citation></citation-alternatives></ref><ref id="cit40"><label>40</label><citation-alternatives><mixed-citation xml:lang="ru">Neoclassical Model // American Economic Review. 1993. Vol. 83, September. P. 908-931.</mixed-citation><mixed-citation xml:lang="en">King Robert, G., and Sergio Rebelo. 1993, “Transitional Dynamics and Economic Growth in</mixed-citation></citation-alternatives></ref><ref id="cit41"><label>41</label><citation-alternatives><mixed-citation xml:lang="ru">Pierre-Olivier Gourinchas. Notes for Econ202A: The Ramsey–Cass–Koopmans Model //</mixed-citation><mixed-citation xml:lang="en">the Neoclassical Model“, American Economic Review. vol. 83, September, pp. 908-931.</mixed-citation></citation-alternatives></ref><ref id="cit42"><label>42</label><citation-alternatives><mixed-citation xml:lang="ru">UC Berkeley Fall 2014 https://eml.berkeley.edu/~{}webfac/gourinchas/e202a_f14/</mixed-citation><mixed-citation xml:lang="en">Pierre-Olivier, Gourinchas. 2014, “Notes for Econ202A: The Ramsey–Cass–Koopmans Model“,</mixed-citation></citation-alternatives></ref><ref id="cit43"><label>43</label><citation-alternatives><mixed-citation xml:lang="ru">Notes_Ram-sey_Cass_Koop-mans_pog.pdf</mixed-citation><mixed-citation xml:lang="en">UC Berkeley Fall, https://eml.berkeley.edu/\~{}webfac/gourinchas/e202a\_f14/Notes\</mixed-citation></citation-alternatives></ref><ref id="cit44"><label>44</label><citation-alternatives><mixed-citation xml:lang="ru">_Ram\-sey\_Cass\_Koop\-mans\_pog.pdf.</mixed-citation><mixed-citation xml:lang="en">_Ram\-sey\_Cass\_Koop\-mans\_pog.pdf.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
