The Axiomatic Structure of Empirical Content
将经济理论的经验内容定义为最不严格的观测等价理论，并证明其可由特定类型的公理化（原子公式合取的普遍否定）来刻画。
We define the empirical content of an economic theory as the least restrictive observationally equivalent theory. We show that the empirical content of a theory is captured by a certain kind of axiomatization, with axioms that are universal negations of conjunctions of atomic formulae.