Concerning case range, Gary King, Robert Keohane, and Sidney Verba alert versus "selecting on the dependent variable". They argue one example is that researchers can not make valid causal inferences about war outbreaks by only investigating instances exactly where war did come about (the researcher must also check out cases https://casesolution91203.activosblog.com/31973773/case-study-analysis-can-be-fun-for-anyone