The U.S. IRS has published Publication 901 (Rev. September 2016), which covers whether a tax treaty between the U.S. and a particular country offers a reduced rate of, or possibly a complete exemption from, U.S. income tax for residents of that particular country. The publication contains discussions of the exemptions from tax and certain other effects of the tax treaties on the following types of income: Pay for certain personal services performed in the U.S.; Pay of a professor, teacher, or researcher who teaches or performs research in the U.S. for a limited time; Amounts received for maintenance and studies...