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Economic Modeling

  • Overview
  • GIDD
  • Global Linkage Model
  • iSimulate
  • MAMS
  • ENVISAGE
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The Development Prospects Group of the World Bank has developed a broad set of tools for forecasting and policy analysis in the areas of macro-economics, trade, finance, income distribution, and country strategies.

 

  • The Global Income Distribution Dynamic (GIDD) model, is a global CGE-microsimulation framework that takes into account the macro nature of growth and integrates a microeconomic (that is, individual and household) dimension. By including 121 countries and covering 90 percent of the world population, the GIDD is the first macro-micro global simulation model.

  • The Global Linkage model is a global dynamic computable general equilibrium model which supports global trade policy analysis.

  • iSimulate is a platform for performing collaborative economic simulations across the internet. It currently hosts a number of experimental World Bank economic models, including a 150+ country global macroeconomic forecasting model, a model simulating terms-of-trade shocks, and a potential output model.
  • MAMS (Maquette for MDG Simulations) tool is a dynamic Computable General Equilibrium (CGE) model designed for country-level analysis of medium- and long-run development policies, including strategies for reducing poverty and achieving the Millennium Development Goals (MDGs).
  • The ENVISAGE model is designed to analyze a variety of issues related to the economics of climate change
Tools ThumbnailThe Global Income Distribution Dynamic (GIDD) model, is a global CGE-microsimulation framework that takes into account the macro nature of growth and integrates a microeconomic (that is, individual and household) dimension. By including 121 countries and covering 90 percent of the world population, the GIDD is the first macro-micro global simulation model.
Trends ThumbnailThe Global Linkage model is a global dynamic computable general equilibrium (CGE) model maintained by the World Bank to support global trade policy analysis--for example in the current context of the multilateral trade negotiations under the auspices of the Doha Development Agenda. Its underlying database is a 2001-based global social accounting matrix (SAM) composed of 87 regions/countries (of which 69 are individual countries) and 57 economic sectors. Bilateral trade is fully accounted for and includes estimates of export taxes/subsidies, international trade and transport margins, and bilateral import tariffs that incorporate preferences. The database also includes various measures of domestic support--particularly as regards agriculture in the OECD countries. The database is a product of the Global Trade Analysis Project (GTAP) based at Purdue University. The model is recursive dynamic capturing population and labor dynamics, the role of savings and investment on capital accumulation and productivity. The model has been used widely in the World Bank's Global Economic Prospects reports, World Bank policy papers and external publications.

LinkageTechNote.pdf (763 KB)

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Isimulate.jpgiSimulate is a platform for performing collaborative economic simulations across the internet. It currently hosts a number of experimental World Bank economic models, including a 150+ country global macroeconomic forecasting model, a model simulating terms-of-trade shocks, and a potential output model.

 

 

Target Users 
Macroeconomists, statistical modelers, academics, national statistical offices and interested researchers

Description
iSimulate allows users to run simulations on a variety of economic models, without the need to install any specific software on their computer. iSimulate hosts some of the World Bank’s experimental global macro-models, all of which are 100% free to use. iSimulate users can connect with each other via virtual working groups, and use automatically configured group blogs as publishing tools to disseminate their work to the world.

Via iSimulate’s collaboration features, users can work together in real-time on their simulations through a syncing mechanism, which keeps each user’s results up-to-date with other group members’ at all times. iSimulate also keeps a log of all simulation results, so that users can revert back to previous simulation results at any time.

Requirements and Usage Conditions 
Supported Browsers: Internet Explorer 6+, Firefox 1.5+ (PC, Mac), Safari 3+, Chrome 3+, Opera 9+ (PC, Mac). iSimulate is a private beta service which lets in users on a periodic basis. Its usage follows the standard World Bank Terms and Conditions

Migration and Remittances ThumbnailThe MAMS (Maquette for MDG Simulations) tool is a dynamic Computable General Equilibrium (CGE) designed for country-level analysis of medium- and long-run development policies, including strategies for reducing poverty and achieving the Millennium Development Goals (MDGs).

Tools ThumbnailWorld Bank’s Environmental Impact and Sustainability Applied General Equilibrium (ENVISAGE) model is designed to analyze a variety of issues related to the economics of climate change.

 

  • Baseline emissions of CO2 and other greenhouse gases
  • Impacts of climate change on the economy
  • Adaptation by economic agents to climate change
  • Greenhouse gas mitigation policies—taxes, caps and trade
  • The role of land use in future emissions and mitigation
  • The distributional consequences of climate change impacts, adaptation and mitigation—at both the national and household level.

ENVISAGE is intended to be flexible in terms of its dimensions. The core database—that includes energy volumes and CO2 emissions—is the GTAP database, currently version 7.0 with a 2004 base year. The latter divides the world into 113 countries and regions, of which 95 are countries and the other region-based aggregations. The database divides global production into 57 sectors—with extensive details for agriculture and food and energy (coal mining, crude oil production, natural gas production, refined oil, electricity, and distributed natural gas). Due to numerical and algorithmic constraints, a typical model is limited to some 20-30 sectors and 20-30 regions. Please note that the existing document is being revised to reflect the latest developments in the ENVISAGE model.

MODEL SPECIFICATION (1,047 KB)

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