نشریه پژوهش های اقتصاد صنعتی
پیاپی 8 (تابستان 1398)

From the perspective of international relations scholars, especially in the liberal tradition, economic cooperation such as trade and investment play a key role in promoting peace and preventing war. Accordingly, the present article, while pointing to objective examples of international relations using "game theory" shows how "economic cooperation in the form of international investment can "While maximizing the benefit of investors, it prevents war and the development of peace". In this paper, using game theory and providing a static game between players, Model the game between investors and countries (with the same economic power) has been dealt with according to each player's possible strategies. To this purpose firstly considered two countries that indifferent to one another and in the third case, there are three countries, one of which is enemy and the other indifferent. Given the equilibrium obtained in all three cases the overall result is that Investor by forming portfolios and investing in different markets and countries achieve the best outcome (Nash equilibrium) by building interaction and peace.

Due to the impacts of exchange rate on the value of energy sector variables, this study investigates Exchange rate Overshooting and its effect on energy sector (oil-gas) Value Added. For this purpose, in the two scenarios, firstly, using the Mandel Fleming and Dornbusch model, the exchange rate was analyzed And by using the Autoregressive Distributed Lag (ARDL) Approach, long-run relationships between exchange rate monetary  Overshooting variables and other variables were determined.. In the second scenario, to investigate the effects of exchange rate monetary  Overshooting and its effect on the value added of the energy sector ,we used the threshold regression model (TAR) with two different regimes .According to the results when the exchange rate is below the threshold (149.98), the variables of gross fixed capital formation and currency exchange rate overshooting are not significant and the variables of energy consumption, inflation and capital stock have a significant effect on the value added of the energy sector. Also after the threshold (149.98) the variables of capital stock and inflation are not significant and the variables of energy consumption exchange rate monetary  Overshooting and gross fixed capital formation have a significant effect on the value added of the energy sector.

Today, one of the most important threats to manufacturers of high quality signs is the presence of manufacturers who offer the same signs with low quality and lower price. In this article, two main manufacturing companies are considered, one is the main manufacturing company and produces both types of signs (both high quality and low quality) and the other company is only producing low quality signs. Then the game between these two companies is designed and the consequences of this game are reviewed and strategies are provided for the producers of high quality and low quality signs in the field of price. The results show a direct relationship between the price of a low quality token and the quality of a high quality token. There is also a direct relationship between price and quality of high quality tokens. On the other hand, the relationship between the quality of the low quality production mark and the production costs of the high quality mark is inverse. Also, the relationship between low quality production mark and unfavorableness due to the purchase of low quality goods (λ) is inverse. One of the most important results obtained in this research can be said that the welfare effects of the producer of high quality signs will increase if they enter the market of low quality signs.