Interarea Price Comparisons for Heterogeneous Goods and Several Levels of Commodity Aggregation

Mary F. Kokoski, Brent R. Moulton, and Kimberly D. Zieschang, International and Interarea Comparisons of Income, Output, and Prices (University of Chicago Press, 1999), chap. 3, https://www.nber.org/books-and-chapters/international-and-interarea-comparisons-income-output-and-prices/interarea-price-comparisons-heterogeneous-goods-and-several-levels-commodity-aggregation.