Fellowship Stipend Support and the Supply of Science and Engineering Students: NSF Graduate Research Fellowships
研究美国国家科学基金会研究生研究奖学金（NSF GRF）的津贴支持如何影响理工科学生的供给，基于对经济学、工程学等学科的分析。
Fellowship Stipend Support and the Supply of Science and Engineering Students: NSF Graduate Research Fellowships by Richard B. Freeman. Published in volume 95, issue 2, pages 61-65 of American Economic Review, May 2005