The author researches into the theory of transaction expenses and “Kouz’s theorem” as it’s methological basis that constitute foundation for modern institutional politics. Argued is necessity to get over abstraction of “Kouz’s theorem”, as well as it’s ontological expansion. Substantiated is the theory of transaction expenses and institutions, that display the logic of their co-operation in evolutionary aspect
Key words: transaction expenses, institutions, ontology, gnosiology, Kouz’s theorem, North’s imperative, Inshakhov’s axiom, Maevsky’s theorem, integral theorem
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