Complex sentence: Most of the economic theory employed here is neoclassical traditional economics including price theory, which evaluates strategic interaction between actors and transaction cost economics, which incorporates cost of identifying actors, negotiating, and costs of enforcing agreements into price theory.
Split into simpler sentences: Most of the economic theory employed here is neoclassical traditional economics. Human Rights in International Relations (Cambridge University Press 2000) Transaction cost economics, which incorporates cost of identifying actors, negotiating, and costs of enforcing agreements into price theory.