How to Write SOP?

I do not want to state some rules here. I want to prevent you from writing an awful SOP. Like other human-made, SOP is a game. The departments know that you know their interest fields, thus if you want to reveal the IO as your interest field, you should be reasonable, because other applicants tell the IO as their interest too. The reasonability is the main issue in SOP.

Write the SOP as short as you can. The faculties, who should select between applicants, never read all SOPs. Some students prefer to bold key sentences. I deny this method. First sentence of each paragraph emerge the meaning of that paragraph. Write the gist of each paragraph besides it. Think about that gist. Is it necessary to write about such a gist in SOP? If not, delete it and if yes, adopt the first sentence of paragraph to show this gist.

SOP answers to 3 questions.
· Why do you want to pursue Ph.D. in Economics? Ph.D. lasts 5 years, it is a bit hard to leave your hometown and continue your research and studies in a foreign country. So you should exhibit reasonable explanation why you want to pursue your studies.
· Why should they choose you among all other applicants? You must satisfy them to choose you.
· Why you choose this university? Any SOP should answer these questions.