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Altshuler, Rosanne; Bull, Nicholas; Diamond, John; Down, Tim; Moomau, Pamela . (2005). The Role of Dynamic Scoring in the Federal Budget Process: Closing the Gap between Theory and Practice. American Economic Review, 95(2), 432–436. doi:10.1257/000282805774669754 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research