Bithas (2011) links the question of externalities to that of valuation. While rejecting monetary valuation, he argues for environmental accounts and the preservation of the integrity and resilience of ecosystems and their functions: “The preservation of environmental functions,
services and infrastructure is the solution to intergenerational environmental externality. This should be designed in environmental terms which cannot be expressed through economic valuations” (p. 1706). The paper introduces some of the core ideas of ecological economics - such as lexicographic preferences, non-monetary valuation and intergenerational resource allocation — to the debate.
Van den Bergh (2012), in a second statement to Common (2011), stresses his initial argumentation. He also argues that ecological economics is congruent with the notion of externality