Aggregation of Economic Indicators Across Countries: Exchange Rate versus PPP Based GDP Weights
Summary:
Relative GDP shares are frequently used as weights in aggregations. In order to ensure that these weights reflect countries’ shares in real output, GDP data in national currencies should be converted into a common numeraire currency at purchasing power parity (PPP) rates. A review of the empirical evidence on the relationship between exchange rates and prices suggests that market (or official) exchange rates are generally poor proxies for PPP rates. The paper examines the PPP-based GDP data generated by the International Comparison Program and compares aggregations with PPP- and exchange rate-based GDP weights.
Series:
Working Paper No. 1992/036
Subject:
Currencies Exchange rates Expenditure Foreign exchange Market exchange rates Money Public investment and public-private partnerships (PPP) Purchasing power parity
English
Publication Date:
May 1, 1992
ISBN/ISSN:
9781451845396/1018-5941
Stock No:
WPIEA0361992
Pages:
44
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