Jack Snyder, “‘Is’ and ‘Ought’: Evaluating Empirical Aspects of Normative Research,” in Progress in International Relations Theory, eds. Colin Elman and Miriam Elman (Cambridge, MA: MIT Press, 2003).

“‘Is’ and ‘Ought’: Evaluating Empirical Aspects of Normative Research.” Progress in International Relations Theory, ed. Colin Elman and Miriam Elman (MIT Press, 2003).