International Comparison Program

International Comparison Program
Name	International Comparison Program
Abbreviation	ICP
Formed	1968
Purpose	Comparative price statistics, purchasing power parity
Headquarters	Washington, D.C.
Region served	Global

International Comparison Program

The International Comparison Program is a global statistical initiative that produces comparable price and volume measures across countries, supplying purchasing power parity estimates, real GDP comparisons, and price level indices for use by United Nations bodies, World Bank, International Monetary Fund, Organisation for Economic Co-operation and Development, and national statistical offices. Its outputs inform international policy debates at venues such as the G20, United Nations General Assembly, World Economic Forum, and Group of Twenty Finance Ministers and Central Bank Governors. The program coordinates technical work across multilateral institutions, regional development banks like the Asian Development Bank, and national bureaus such as the U.S. Bureau of Economic Analysis, the Office for National Statistics (UK), and Statistics Canada.

Overview

The ICP coordinates multinational price surveys and compiles Purchasing Power Parity-based Gross Domestic Product aggregates that adjust nominal figures for cross-country price differences, enabling comparisons used by United Nations Development Programme, the World Bank Group, the International Monetary Fund, European Commission, and regional organizations such as the African Union and Association of Southeast Asian Nations. The program's datasets are integrated into international accounts maintained by agencies including the System of National Accounts 2008 and inform indicators tracked by Sustainable Development Goals, the International Comparison Program Board, and statistical committees such as the United Nations Statistical Commission and the United Nations Economic Commission for Europe.

Methodology and Data Collection

ICP methodology uses national price collectors in coordination with regional implementing agencies such as the Statistical Centre for the Cooperation Council for the Arab Countries of the Gulf and the Eurostat. It employs sampling frames drawn from national accounts compiled under the System of National Accounts and uses standardized product specifications like those in the Harmonized Index of Consumer Prices and product baskets similar to those used by Consumer Price Index programs at agencies like the Bureau of Labor Statistics and Instituto Nacional de Estadística y Geografía. Data collection covers price quotations for goods and services, expenditure weights from household surveys such as the Living Standards Measurement Study, and capital goods valuation consistent with guidance from the International Monetary Fund. Technical coordination includes training from organizations like the International Labour Organization and methodological advice referencing work by economists such as Irving Fisher, Simon Kuznets, and Gabriel Zucman.

Purchasing Power Parity and Price Level Indices

ICP computes purchasing power parity conversion factors and price level index measures using spatial and temporal multilateral methods, including the use of ring comparisons and multilateral weighting schemes related to the EKS method and Geary–Khamis method. Results provide PPP-adjusted GDP per capita used in rankings by institutions including the World Bank, International Monetary Fund, United Nations Development Programme, and research centers like the Brookings Institution and Institute of Development Studies. PPP measures are referenced in analyses by scholars at institutions such as Harvard University, London School of Economics, Massachusetts Institute of Technology, and Princeton University.

Applications and Uses

ICP results serve policy and research communities: international organizations such as the World Trade Organization, OECD, and Asian Development Bank use ICP data for cross-country welfare comparisons, fiscal benchmarking for the European Central Bank, allocation formulas in programs administered by the World Bank Group, and poverty assessment by the United Nations Children's Fund. Academics at Columbia University, Stanford University, and University of Chicago use PPPs for cross-national studies on development, productivity analyses by the International Labour Organization, and climate-economy models at the Intergovernmental Panel on Climate Change. Private sector analysts at firms like Goldman Sachs and McKinsey & Company employ ICP-derived metrics in global market sizing and investment research.

Governance and Participating Organizations

ICP governance comprises a Governing Board with representatives from the United Nations Statistical Commission, World Bank Group, International Monetary Fund, and regional development banks including the African Development Bank and Inter-American Development Bank. National statistical offices—examples include Instituto Nacional de Estadística (Chile), Deutsche Bundesbank-linked agencies, Instituto Nacional de Estadística y Censos (Argentina), and National Bureau of Statistics of China—participate alongside regional hubs such as Statistical, Economic and Social Research and Training Centre for Islamic Countries. Technical advisory groups include experts from academia and institutions like the International Statistical Institute and the Research Department of the World Bank.

Criticisms and Limitations

Critiques of the ICP arise in literature from scholars at University of Oxford, University of Cambridge, and policy centers such as the Brookings Institution and Peterson Institute for International Economics regarding substitution bias, representativeness of product baskets, and treatment of quality differences—issues also debated in forums including the United Nations Statistical Commission and conferences at the International Association for Research in Income and Wealth. Methodological debates reference alternative approaches championed by economists like Alan Heston and Robert Summers, and touch on price sample coverage problems studied by researchers at National Bureau of Economic Research, Centre for Economic Policy Research, and the European Central Bank.

Historical Development and Key Rounds

Founded in 1968 with support from the United Nations and the World Bank, the ICP has completed major rounds periodically—landmark rounds include early work in the 1970s, expansion in the 1993 round involving OECD members, the 2005 round coordinated with Eurostat, and the comprehensive 2011 and 2017 rounds with global coverage used by the World Bank for global poverty updates. Key contributors over time have included national offices such as Statistics New Zealand, Australian Bureau of Statistics, Statistics Netherlands, and research centers at Princeton University and Yale University.

Category:International statistics