LTGM-PC latest version: LTGM-PC v5.3 (Excel file) The Excel tool, working paper, and an appendix to the working paper are downloadable: The LTGM-PC is described in the working paper “Assessing the Effect of Public Capital on Growth: An Extension of the World Bank Long-Term Growth Model” by Devadas and Pennings. In the model, public investment generates a larger boost to growth if existing stocks of public capital are low, or if public capital is particularly important in the production function. The LTGM-PC also includes a new cardinal Infrastructure Efficiency Index (IEI), which measures the quality of public capital. The LTGM-PC spreadsheet is similar to the standard LTGM: transparent (no macros) and easy-to-use, and with all relevant data preloaded for almost all countries. The LTGM-PC spreadsheet allows users to analyze the effect of an increase in public or private investment or the quality of public investment on economic growth. The LTGM-PC is an extension of the standard LTGM (above) which separates the total capital stock into public and private portions, and adjusts the public component for quality. Last updated: December 2022 Public Capital Extension (LTGM-PC)
The LTGM is regularly updated so check back for new versions. Note that example simulations are purely illustrative and do not necessarily reflect the views of the World Bank.
Instructions and Worked Example Simulations (PDF)
FOCUS BOOSTER SPREADSHEET HOW TO
Technical Slides (2019) - Model Overview and How to Use the Spreadsheet (PDF) This Policy Research Talk presented the fundamentals of the LTGM, its various extensions, as well as examples of its applications in different countries around the world.
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