This is a poor proxy, as it over-values areas with high, uneven distributions of capital accumulation. If the Netherlands were to succumb to the impending boiling sea-waters, that would necessarily have a higher "economist cost" than a similar tragedy befalling Nigeria, despite Nigeria having over 10x the population of the Netherlands.
Rather than viewing the very real human impact, the "economist cost" rides the coat-tails of chauvinist mythology by saying that, yes, in fact a Dutchman is worth 11x a Nigerian.
> there's a reason that economists are more likely to get invited to a climate summit than psychologists.
I can guarantee you it's not the reason you think it is.