即PS，不同学校叫法不一样。有的学校叫Statement of Intent(如Notre Dame，该校去年经济系重组没招人)，有的叫Statement of Purpose(Columbia)，但是不是一回事呢？我认为是不一样的，如果学校只要求写一篇个人的EASSY，那你的选材可以很广泛。如果学校是Statement of Intent/Purpose，那么你的重点应该放在为什么选这个学校？他的哪一块你认为对你以后的学习和研究最有帮助？你对你要concentrate的领域的看法，这一点很重要：比如一个北大的G们就写了GAME THEORY对国际贸易的作用：
I am fascinated by game theoretic modeling of issues pertaining to International Economics. I believe that game theoretic models can be effectively used in international economics as many policy issues such as negotiations over mutual reductions in tariffs, formation and preservation of customs unions, establishment of cartels in the case of internationally traded goods, all have some game theoretic character. The current "Regionalism versus Multilateralism" debate holds its own attraction. It should be interesting to analyze the trade diversion effects of Preferential Trading Agreements and also their impact on multilateral institutions like GATT. The strategic trading that takes place in foreign exchange markets and the variety of auction like mechanisms that have been used for foreign exchange trade, especially in developing countries, are intriguing. During my graduate studies I aim to equip myself with some advanced tools and develop my analytical and research capabilities. I want to get an excellent command over econometrics to be able to confront stochastic statistical data with exact models of economic theories and also for empirical verification of other models, which might otherwise be set in a partial equilibrium framework. I expect to emerge as an economic engineer and an expert in model building. Econometrics perse, also interests me as a subject of economics and I might like to research in econometric methodology.
显然，他是看了克鲁格曼的战略性贸易理论深受启发，提出了自己的观点。
这是我自己谈金融方向的观点：
I would like to concentrate on financial markets development, as I was always wondering whether those established theories app