TACKLING NEGATIVELY CORRELATED GLOBAL AND LOCAL EXTERNALITIES - AN ECONOMIC STUDY OF MULTIPLE GASES ISSUE IN CLIMATE CHANGE

摘要

In this paper, we examine the relationship between CO_2 and SO_2 (including carbonaceous aerosols) mitigations in a framework of correlated global and local externalities. The framework is set up in a revised RICE model [Nordhaus, WD and Z Yang (1996). A regional dynamic general-equilibrium model of alternative climate-change strategies. American Economic Review, 86(4), 741-765], which we labeled as the RICES model (stands for RICE with Sulfur). In RICES model, we pioneer the empirical modeling of negatively correlated global and local externalities through negative radiative forcing of aerosols. Through simulating different scenarios, we quantify the impacts of local pollution control efforts at mitigating SO_2 emissions on climate change and indicate the policy implications of correlations between CO_2 and SO_2 emissions.