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| 2. |
- Drin, Bohdan, et al.
(författare)
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НЕЛІНІЙНА МОДЕЛЬ ПОВЕДІНКИ ДВОХ КОНКУРЕНТНИХ ФІРМ : [The Nonlinear Model of Behavior of Two Competitive Firms]
- 2021
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Ingår i: Bulletin of Chernivtsi Institute of Trade and Economics. - : Chernivtsi Institute of Trade and Economics of Kyiv National University of Trade and Economics. - 2414-5831 .- 2310-8185. ; 81:1, s. 115-128
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Tidskriftsartikel (refereegranskat)abstract
- The practical task of economics lies in applying the methods of substantiating its decisions. For economics, the main method is the modeling of economic phenomena and processes and, above all, mathematical modeling, which has been stipulated by the presence of stable MATHEMATICAL METHODS, MODELS AND INFORMATION TECHNOLOGIES IN ECONOMY Issue I (81), 2021 117 quantitative patterns and the possibility of a formalized description of many economic processes. The economic-mathematical model contains a system of equations of linear and nonlinear units that promote a mathematical description of economic processes and phenomena, consists of a set of variables and parameters and serves to study these processes and control them. Dynamic models of the economy describe it in development, as well as provide a detailed description of technological methods of production. Mathematical description of dynamic models is carried out with the use of a system of differential equations (in models with continuous time), difference equations (in models with discrete time), as well as systems of algebraic equations. It is important that the investigation of various economic issues has led to the development of the mathematical apparatus. In linear algebra, productive matrices are caused by the studies of intersectoral balance, whereas mathematical programming arose in the course of researching the optimal plan for the distribution of limited resources. In a similar way, there emerged the theory of economic indices and econometrics, the theory of production functions and the theory of consumption, the theory of general economic balance and social welfare, the theory of optimal economic growth. The paper under studies deals with the dynamic economic behavior of two competing objects, whose mathematical model is a nonlinear nonlocal problem for a system of ordinary differential equations with variable coefficients and argument deviation. The dynamic mathematical model is based on the assumption that the volume of output of both firms is determined by such factors on which output depends linearly. The model under discussion includes nonlinear factors, which describe the level of distrust of the competitors and depend on the time of observations and production volumes in previous moments, because the latter significantly affect the production activities of the firm. Such mathematical models are called time-delayed models.
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| 3. |
- Drin, Iryna, et al.
(författare)
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МАТЕМАТИЧНА МОДЕЛЬ ГЛОБАЛЬНОГО ЕКОНОМІЧНОГО ПРОЦЕСУ З НЕЛОКАЛЬНИМИ УМОВАМИ : [Mathematical model of global economic process with non-local conditions]
- 2018
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Ingår i: Bulletin of the Chernivtsi Trade and Economic Institute. - Chernivtsi : Chtei Knteu. - 2310-8185 .- 2414-5831. ; :1-2, s. 152-158
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Tidskriftsartikel (refereegranskat)abstract
- The essence of dynamic economic behavior of competing economic entities, which simulated nonlocal problem for systems of differential equations with variable coefficients is revealed. Developed a dynamic mathematical model assuming that total production is determined by the following factors: the number of products each side, changing certain equipment, which leads to changes in output, the degree of distrust of competitors, and assuming that the rate of change in output proportional to these factors. A partial case of such a model is the model of the arms race. The economic interpretation of nonlocal conditions is that the production volumes at different times governed by predetermined condition. A mathematical model designed to study the dynamics of the economic process of adjusting production volumes at different times.
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| 4. |
- Drin, Svitlana, 1977-, et al.
(författare)
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A Model of a System of Simultaneous Equations with a Lag Effect for Estimating the Quality of an Advertising Campaign
- 2022
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Ingår i: Mohyla Mathematical Journal. - МОДЕЛЬ : National University of Kyiv-Mohyla Academy. - 2617-7080 .- 2663-0648. ; 5, s. 33-37
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Tidskriftsartikel (refereegranskat)abstract
- This article describes the creation of a more generalized system of simultaneous equations for forecasting the level of sales depending on advertising campaigns on different channels and other factors. RStudio (R programming language) and Google Colab (Python programming language) environments describe the creation of a model based on real data of a product. The Hausman specification test was applied to determine the model estimation method. As a conclusion, the indicators of advertising campaigns turned out to be endogenous variables, which indicates the importance of using the 2MNK method. It was found that the volume of advertising is the cause of the volume of sales according to Granger, which cannot be said about the reverse assumption - the causality of the volume of advertising from sales according to Granger. The ”depth” of lags is also determined, namely, one lag for both advertising channels. The dependence of sales volumes on various factors, including product distribution, the price index, the influence of advertising and its lags, and the influence of competitors’ advertising activities, was evaluated. The coefficients of the resulting more generalized system of simultaneous equations were estimated using the two-step least squares method. All statistical indicators testify to the adequacy of the model. Performance indicators (ROI - return on investment) of advertising campaigns showed that advertising both on television and on the Internet is profitable for the company’s product in question. The relevance of this article lies in the creation of a more general system of simultaneous equations with the inclusion of a product sales forecast model taking into account the influence of advertising.
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| 7. |
- Orzikh, Yu.H. 1985-
(författare)
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нотаріальна таЄМницЯ і проБлеМи ЇЇ правоЗастосуваннЯ: МіФи та реальність : NOTARIAL SECRECY AND THE PROBLEMS OF ITS ENFORCEMENT: MYTHS AND REALITY
- 2019
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Ingår i: Uzhhorod National University Herald. Series: Law. - : Uzhhorod National University. - 2307-3322. ; 59:1, s. 162-166
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The article is devoted to the problems of application of the notary’s duty to keep notarial secrecy (confidentiality). Theoretical, legislative and practical aspects of notarial secrecy and its application are investigated. In particular, notarial secrecy is considered as the basis of notarial activity and ethical rules of notariat and its organization. The assumption is made that in case of practical impossibility to keep notarial secrecy and threats to notarial secrecy, the level of public trust in the notarial institute will decrease. This, in turn, will lead to a more rapid formation of personal trust relationships and appeal to the notary not as a subject, which can provide appropriate legal assistance and protection of rights and interests, but as a representative of the institute to which the law is required to apply and to whom the person would not turn unless the law required it.The author emphasizes the impossibility of the existence of a notary institution in the conditions of inefficient legislative regulation of notarial secrecy (confidentiality). The ambiguity of legislative regulation is a generating factor for differential law enforcement practice (application of law). Thus, on the materials of the requests of the relevant authorities and officials, in the conditions of necessity to keep notarial secret, the content and nature of the requested information and documents from notaries are analyzed. At the same time, the author emphasizes that even the most perfect legislative regulation of notarial secrecy cannot withstand the realities of everyday law enforcement (application of law) and will entail again ambiguous and differentiated practice of law enforcement. The causal link assumed by the author is that every law enforcement entity operates within the conditions and legal frameworks constructed by the law governing it, the entity, its activities and such regulatory framework, as a rule, without taking into account the features of notarial activity. In other words, the lack of systematicity in the legal system is reproduced in the activities of law enforcement entities, and therefore can be overcome by adjusting the activities of law enforcement entities by the entities themselves. That is why the author believes that quality and effective legislative regulation is a necessary but not sufficient condition for solving the problem of law enforcement practice. The solution to the problem should be based on the basis of qualitative legislation and dialogue of the subjects of law enforcement, which will allow each party to hear the position of the other and create a mechanism for implementation of specific norms without violating them (infringing them) and / or abusing their application. The conclusion is made about the possibility of using mediation in a law enforcement practice (application of law practice) where law enforcement subjects are able and agree on a single interpretation of a specific law in a particular situation.
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| 8. |
- Orzikh, Yu.H. 1985-
(författare)
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ЩОДО ОКРЕМИХ АСПЕКТІВ ШВЕДСЬКОГО ПІДХОДУ ДО ПРИВАТНОГО ПРАВА: ПОРІВНЯЛЬНИЙ АНАЛІЗ : ON THE CERTAIN ASPECTS OF THE SWEDISH APPROACH TO PRIVATE LAW: COMPARATIVE OVERVIEW
- 2023
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Ingår i: Juridical scientific and electronic journal. - : Law Faculty of Zaporizhzhia National University. - 2524-0374. ; :6, s. 158-162
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The article provides a comparative analysis of the Swedish approach to private law and the legal system of Ukraine. The study is motivated by Ukraine's obligations to harmonize its law with EU law, given its candidacy for EU membership.The article discusses several aspects of Swedish private law, including its sources, the principle of freedom of contract, the principle of pacta sunt servanda, the principle of clausula rebus sic stantibus, the right to make a will, and the role of the state in private law relations, specifically the Swedish Tax Administration as a state agency.The author asserts that there is a correlation between the method of regulation of private law relations and the system of sources of law in a legal system. The more the law enforcement practice and legislation give primacy to the subjective will of participants in private law relations as a source of their regulation and a source of law, the less influence the imperative method of regulation will have in these private law relations.In addition, the article highlights the unique position of the Swedish Tax Administration in private law relationships, particularly family and inheritance relations. The author concludes that state integration into private legal relationships, as exemplified by the Swedish Tax Administration, does not inherently result in limitations of any individual rights and freedoms. The author concludes that registration of marriage contracts is necessary in order to protect the rights of spouses, their heirs, and third parties more thoroughly.As it efforts to harmonise its laws with those of the EU, the article suggests that Ukraine can learn from Sweden's approach to private law. The author also emphasises the need for additional research to completely comprehend the peculiarities of Swedish private law before using it as an example.
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| 9. |
- Orzikh, Yurii, 1985-
(författare)
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ІТ та нотаріат : IT and Notariat
- 2019
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Ingår i: ІТ право. теорія та практика. - Ukraine : Phenix. - 9789669281678 ; , s. 410-426
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Bokkapitel (populärvet., debatt m.m.)abstract
- In the chapter issues of the implementation of informational technologies in notarial activity in Ukraine are explored from the legal perspective.
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| 10. |
- Orzikh, Yurii, 1985-, et al.
(författare)
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Глава 85. Спадкування за заповітом : Chapter 85. Testate succession
- 2023
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Ingår i: Цивільний кодекс України. Науково-практичний коментар. - Ukraine : Norma Prava. - 9786177850600 ; , s. 1322-1335
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Bokkapitel (refereegranskat)abstract
- Commentary of the Civil code of Ukraine on testate succession is provided and analyzed from the practical point of view.
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