
The 2018 Bank of Sweden Prize (falsely known as the Economics Nobel Prize) winner William Nordhaus opens the revised version of as follows: 鈥淚 begin with the fundamental problem posed by climate change 鈥 that is a public good or externality. Such activities are ones whose costs or benefits will spill outside the market and are not captured in market prices.鈥
The concept of externalities is a catch-all term, or, an empty box to capture the so-called spillover effects. Under the presumption that the market mechanism brings about the efficient allocation of resources, mainstream economic theory as well as many of its heterodox critiques argue for internalizing these spillovers by determining their costs (or benefits) and including it in the price of the commodity. In other words, the spillover effect itself must be turned into a commodity so that the market can efficiently handle it through the price mechanism.
Insofar as human-induced global warming has not been priced, so the story goes, it is an externality. In fact, it is today 鈥渢he most significant of all environmental externalities鈥 even in Nordhaus鈥 wisdom. Make no mistake 鈥 Nordhaus fiercely advocated inaction for over three decades, and portrayed projected levels of global warming, which are defined as devastating, or even catastrophic by scientists, as optimal.