by Dan | Apr 23, 2019 | Analysis
some useful articles: https://journals.sagepub.com/doi/abs/10.1177/1355819612473591?journalCode=hsrb https://stel.bmj.com/content/early/2018/10/20/bmjstel-2018-000377 https://link.springer.com/chapter/10.1057/978-1-137-53551-1_13...