摘要:Economic sanctions are seen as a foreign policy instrument less severe than military engagement but more potent than diplomacy. The assessment of the economic impact of sanctions invariably focuses on direct bilateral trade, with little regard to indirect costs. In the case of sanctions on Iran, the real cost to Iran and the U.S. is not so much due to reduced trade but to factors such as missed investment and joint venture opportunities, especially in the energy sector. The significant size of these costs for Iran will make it difficult for Iran to resume business as usual with U.S. companies when sanctions are lifted; and for U.S. energy companies, their long-term competitiveness in Iran and also globally will be reduced. JEL Codes: F23, F13 Keywords: