1. Anderson, T., Kunitomo, N., Matsushita, Y., et al. The limited information maximum likelihood estimator as an angle. CIRJE No. CIRJE-F-619, CIRJE, Faculty of Economics, University of Tokyo (2009).
2. Jackknife instrumental variables estimation
3. Athey, S., Chetty, R., and Imbens, G. Combining experimental and observational data to estimate treatment effects on long term outcomes. arXiv preprint arXiv:2006.09676 (2020).
4. Athey, S., Chetty, R., Imbens, G., and Kang, H. Estimating treatment effects using multiple surrogates: The role of the surrogate score and the surrogate index. arXiv preprint arXiv:1603.09326 (2016).
5. Burgess, S., and Thompson, S. G. Interpreting findings from mendelian randomization using the mr-egger method. European journal of epidemiology 32 (2017), 377--389.