Extrapolating PPPs between Benchmarks and Estimation of PPPs for Non Benchmark Countries
In order to meet data user demands, PPPs for years between benchmark periods are provided in the World Development Indicators. These extrapolations are based on GDP growth rates. Different procedures are used by the Penn World Tables which bring in come cost of living data as well. In addition, PPPs are imputed for non benchmark countries.
The TAG working group and the Global Office examined the possile improvements for the extrapolation method and proposed a new approach.
Research Item 09: Extrapolating PPPs between benchmarks and estimation of PPPs for non benchmark countries