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A method for the computation of standard errors for Geary-Khamis parities and international prices
Prasada Rao, D. S., (1990)
A generalized Theil-Tornqvist index for multilateral comparisons
A taxonomy of multilateral methods for making international comparisons
Hill, Robert J., (1995)
Index numbers : a stochastic approach
Selvanathan, Eliyathamby Antony, (1994)