◂
sci
hub

to open science
Card, David; Lee, David S.; Pei, Zhuan; Weber, Andrea . (2015). Inference on Causal Effects in a Generalized Regression Kink Design. Econometrica, 83(6), 2453–2483. doi:10.3982/ecta11224 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research