In philosophy, the theory of knowledge that attempts to determine what knowledge is and how it can be obtained, in social sciences it is understood as the universally accepted set of criteria for evaluating and testing the validity of competing theories.
McGrew, Anthony (2005) “The Logics of Globalization,” chapter 8 in John Ravenhill, ed. Global Political Economy. Oxford: Oxford University Press, pp. 208-234.
Epistemology is concerned with determining what is relevant and warranted knowledge in the policy process, a consideration that in turn influences both agenda setting and problem definition.