Environmental policies and stagnation in a two-country economy

Global warming poses a serious and acute threat to our planet. However, negotiations over the allocation of permissible carbon emissions often lead to conflicts of interest between developed and developing countries. Developing countries claim that global warming results from long-term pollution emissions by developed countries, while developed countries demand that developing countries should make adequate efforts to reduce carbon emissions. Both developed and developing countries generally agree that stricter emission limits will strain their economies due to the associated extra abatement costs. Using a two-country model with wealth preferences, we find that the impacts of a country's emission limit on real consumption and pollution emissions in both countries vary depending on the combination of their business situations. If both countries achieve full employment, one country's stricter emission limit decreases real consumption in both, as expected. However, if one country faces aggregate demand stagnation while the other achieves full employment, a stricter emission limit imposed by the stagnant country increases real consumption in both countries.