dear colleagues: i am head of the department of international finance in the school of economics at the tsinghua university, perhaps the most prestigious university in china, and i am writing to recommend mr. xxx, one of my favorite students, for acceptance into your master's program. i got to know him personally last semester when he was taking the course of special topics on international finance that i was teaching. in the class, he showed great interest in economics. he studied conscientiously and often talked with me after the class about the questions that he had come across in his readings. once when we talked about the country's ongoing restructuring of its tax system, he delved into the increasing cost of tax evasion. we then discussed several methods of calculating the cost. as we talked, i found that he was very skilled in expressing his ideas through diagrammatic curves and mathematics. recognizing that the government's attitudes to acts of tax evasion will affect not only people's behavior but also the cost of levying taxes, he saw possible solutions to the problem in the game theory. i encouraged him to pursue this idea. he said he didn't know much about the game theory and proceeded to borrow some essays by nash from me. he thus left me with a deep impression. studying with conscientiousness, mr. x often came up with creat