Getting To Know Gmmet The Global Macroeconomic Model For The Energy Transition
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Getting to Know GMMET: The Global Macroeconomic Model for the Energy Transition
Author: Benjamin Carton
language: en
Publisher: International Monetary Fund
Release Date: 2023-12-22
This paper presents GMMET, the Global Macroeconomic Model for the Energy Transition, and provides documentation of the model structure, data sources and model properties. GMMET is a large-scale, dynamic, non-linear, microfounded multicountry model whose purpose is to analyze the short- and medium-term macroeconomic impact of curbing greenhouse gas (GHG) emissions. The model provides a detailed description of GHG-emitting activities (related to both fossil fuel and non-fossil-fuel processes) and their interaction with the rest of the economy. To better capture real world obstacles of the energy transition, GMMET features a granular modelling of electricity generation (capturing the intermittency of renewables), transportation (capturing network externalities between charging stations and electric vehicle adoption), and fossil fuel mining (replicating estimated supply elasticities at various time horizons). The model also features a rich set of policy tools for the energy transition, including taxation of GHG emissions, various subsidies, and regulations.
Public Debt Dynamics During the Climate Transition
Author: Mr. Daniel Garcia-Macia
language: en
Publisher: International Monetary Fund
Release Date: 2024-03-29
Managing the climate transition presents policymakers with a tradeoff between achieving climate goals, fiscal sustainability, and political feasibility, which calls for a fiscal balancing act with the right mix of policies. This paper develops a tractable dynamic general equilibrium model to quantify the fiscal impacts of various climate policy packages aimed at reaching net zero emissions by mid-century. Our simulations show that relying primarily on spending measures to deliver on climate ambitions will be costly, possibly raising debt by 45-50 percent of GDP by 2050. However, a balanced mix of carbon-pricing and spending-based policies can deliver on net zero with a much smaller fiscal cost, limiting the increase in public debt to 10-15 percent of GDP by 2050. Carbon pricing is central not only as an effective tool for emissions reduction but also as a revenue source. Delaying carbon pricing action could increase costs, especially if less effective measures are scaled up to meet climate targets. Technology spillovers can reduce the costs but bottlenecks in green investment could unwind the gains and slow the transition.
United States
Author: International Monetary
language: en
Publisher: International Monetary Fund
Release Date: 2023-06-15
The U.S. economy has proven resilient in the face of the significant tightening of both fiscal and monetary policy in 2022. Consumer demand has held up particularly well, boosted initially by a drawdown of pent-up savings and, more recently, by solid growth in real disposable incomes. Policy restraint is expected to continue to slow the economy in 2023 with a modest pick-up in momentum later in 2024. Unemployment is expected to rise slowly to close to 41⁄2 percent by end-2024.