How is GDP at PPP exchange rates used to calculate WEO country group data? Will I be able to calculate aggregated data based on a different country grouping using PPP exchange rates?
A. Country Group data or aggregates relating to the domestic economy, whether growth rates or ratios, are weighted by GDP valued at purchasing-power-parities (PPPs) as a share of world total or country group GDP. Annual inflation rates are simple percent change from previous years ((CPIt/CPIt-1)-1), except for other emerging and developing economies where the rates are based on logarithmic differences (log(CPIt)-log(CPIt-1)). This exception to the methodology only applies for the inflation series and only whenever a group comprises of countries belonging to the other emerging and developing economies group. Therefore, for the advanced economies, the conventional methodology for aggregating is used. For example, the consumer price index for all advanced economies is calculated by multiplying each country’s CPI inflation times its share (PPP-weight) of the group’s total “gross domestic product based on purchasing-power-parity (PPP) valuation of country GDP.” A country’s share (or weight)
A. Country Group data or aggregates relating to the domestic economy, whether growth rates or ratios, are weighted by GDP valued at purchasing-power-parities (PPPs) as a share of world total or country group GDP. The country group composites will only be calculated when 90 percent or more of the weighted group data is represented. Annual inflation rates are simple percent change from previous years ((CPIt/CPIt-1)-1), except for other emerging and developing economies where the rates are based on logarithmic differences (log(CPIt)-log(CPIt-1)). This exception to the methodology only applies for the inflation series and only whenever a group comprises of countries belonging to the other emerging and developing economies group. Therefore, for the advanced economies, the conventional methodology for aggregating is used. For example, the consumer price index for all advanced economies is calculated by multiplying each country’s CPI inflation times its share (PPP-weight) of the group’s total
Related Questions
- How is GDP at PPP exchange rates used to calculate WEO country group data? Will I be able to calculate aggregated data based on a different country grouping using PPP exchange rates?
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