Jack S. Levy. “Counterfactuals and Case Studies.” Oxford Handbook of Political Methodology, ed. Janet Box-Steffensmeier, Henry Brady, and David Collier (Oxford University Press, 2008).

“Counterfactuals and Case Studies.” Oxford Handbook of Political Methodology, ed. Janet Box-Steffensmeier, Henry Brady, and David Collier (Oxford University Press, 2008).