Economy-wide and CO₂ impacts of carbon taxes and output-based pricing in New Brunswick, Canada

Economic models suggest that greenhouse gas emission reductions are warranted on a global scale. However, more analysis is needed at a regional level to inform local governments about the economics of alternative carbon policies. To this end, we develop a dynamic computable general equilibrium model for the case-study province of New Brunswick, Canada, and consider economic impacts and costs of two carbon policy scenarios. The first, called the Federal ‘backstop’, consists of a carbon tax on small emitters and an output-based pricing system (OBPS) on large emitters. The second consists of a common carbon tax across all emitters. We also consider different carbon tax revenue recycling options under each scenario. Results show that when a carbon tax is applied to all emitters starting at $20/tonne in 2019 and increasing to $170/tonne in 2030, cumulative present value GDP would decline in the range of 0.60%–0.63% (depending on revenue recycling options), and emissions will decline by more than 32%. Under the Federal backstop scenario, GDP reduction is only 0.24–0.26%, and emissions reduction is only 13%. In all scenarios, the costs range between $21 and 50/tonne on average, and are generally lower than the global social cost of carbon estimated in other research.