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The article investigates the formal models as a method of analysis in international studies. The importance of this type of models in writing articles for world leading high-ranking journals from Scopus list is shown. The author reveals the main challenges of interdisciplinary synthesis related to the construction of formal models. The problem of identifying the actors of international relations is revealed, including the assessment of actor's involvement in a concrete international conflict (or process) in the context of the concepts of defensive and offensive realism, as well as of real and of latent (potential) power. The decrease in the influence of the state as the primary actor in international relations, and the increase of influence of new types of actors are shown, including international terrorist networks (led by IS), political parties, media and NGOs in the context of post-modernism, global business structures. At the national level, the main actors are illustrated both by the example of countries with a developed civil society and a market economy, and by that of the traditional non-Western society. The question of levels of analysis in international relations, as well as agent-structure problem are illustrated by concrete cases from modern international relations. The author describes a model of "nested" politics. The main types of models used in international studies (game theoretic, econometric, network analysis, simulation) are indicated as well as their shortcomings. Two kinds of simulation models - system dynamics and agent-based modeling are described. It is noted that the agent-based modeling is carried out mainly in the framework of the constructivist paradigm of international relations theory.

The nature of cooperation regularly changes under pressure from new calls and threats between the actors of international relations. By means of system analysis and comparison methods, the article discloses the basic theoretical approaches to understanding of the "new world order" phenomenon, which as a result turns into a comprehensive globalization. The article summarizes the modern trends of forming the XXI century international reality, taking into account new actors, their influence on stability and variability of the imperious systems, and analyzes in detail the concepts of modern scientists who form an international discourse on the search for a new paradigm of world order. The study identifies the main characteristics of the world order – legitimacy, the mechanism of change and balance of power. The key shortcomings of the post-war world order have been identified, which include the lack of effectiveness of international organizations at various levels in ensuring the principle of sovereignty for states, respect for borders; imbalance of economic growth between nations; lack of effective sanctions against violators of international law and ensuring the universal rights of citizens; discredited democratic political model, which was recognized as dominant in the post-bipolar era, and so on. Accordingly, there were considered modern approaches to a "new world order" formation, as a result of which it was proposed to take into account the new realities of interdependence that determine the future peaceful coexistence of nations – a balance between freedom of national actors action and international law; balance between legitimacy and power; balance between "regional order" and "international". In general, the international discourse on the search for the "new world order" boundaries is common in the construction of the XXI century multipolar world, the importance of consensus between nations and the legitimacy of new rules for all actors in international relations.

The paper deals with the analysis of the legal nature of international courts' decisions and their impact on the international financial legal order. The author claims that decisions of international courts, creating no new international legal financial norms, act as an additional source of international financial law, having no autonomy, and in combination with other sources of international law, performs the following functions: 1) regulatory-prescriptive (via opinio juris of existing traditions in interstate practice in the financial sphere transforming them into international customary law); 2) regulatory-affirming (confirming the legal nature of the international agreement between the subjects of international financial legal relations which caused a disputable situation). The judicial practice on financial issues and specificity of functioning of such judicial institutions as the Permanent Court of International Justice, the International Court of Justice, the CIS Economic Court, the Court of Justice of the European Union, the Court of Justice of the Central African Economic and Monetary Community, etc. are examined. The features of the provisions of international agreements on financial issues regarding the procedure for resolving disputes between the parties of the agreement about its implementation are analyzed. The paper explores particularities of the origin and development of the idea of the creation of an international financial court. Amid modern processes of the rapid growth of the amount of crossborder financial flows in the context of globalization, which is the consequence of the implementation of numerous international financial agreements, the idea of creation of an international financial court, which was first suggested in 1935, due to the complexity of legal nature of interstate financial disputes, is an objective necessity. The following features intrinsic to decisions of international courts (including decisions on financial issues) have been identified: 1) locality (binding only on the ...

In the paper, the nature of official development assistance (ODA) viewed as a component of general international aid is considered, and mechanisms for providing aid in the context of international promotion of sustainable development are described. Also, the current world trends of providing official development assistance are highlighted, and constantly increasing amount of aid is determined. The latter demonstrates that the donor countries ensure the compliance with their international obligations related to the provision of concessional financing, and technical assistance to support the efforts that are being made by countries in the field of development.The dynamics in the amount of official development assistance is analyzed, and distribution of aid by sources of financing, regions, recipients and sectors is outlined. It is found that the largest flows of ODA go mainly to countries in Africa and Asia, and the smallest go to Europe, primarily to the education and healthcare sector, social infrastructure and economic development.It is pointed out that in Ukraine, one of the largest recipient countries of ODA in Europe, there is no holistic mechanism for analyzing the receipt, distribution and control of official development assistance viewed as an instrument of general international aid.The main challenges of mobilizing foreign assistance to Ukraine are outlined and key steps in addressing these matters are proposed. In order to promote efficient use of aid offered by foreign donors in the form of international assistance for the implementation of development programs in Ukraine, the following steps should be taken: to develop a public strategy for using international aid and a system of control for monitoring over international projects; to design a sound mechanism for analyzing the receipt, distribution and control of foreign assistance; to enhance staff performance in development, support and management of international projects in accordance with the requirements of providers of international aid; to establish a single coordinating body responsible for mobilizing international assistance.Taking these steps will increase the efficiency of using aid offered by foreign donors in the form of international assistance for the implementation of development programs and provide an opportunity to pursue sustainable development goals in Ukraine.