Errors in Import-Demand Estimates Based Upon Unit-Value Indexes
比较了使用单位价值指数与美国劳工统计局进口价格指数对细分进口需求弹性估计的影响，发现单位价值指数对弹性估计影响不大。
Disaggregated import-demand elasticity estimates based on import unit-value indexes are used in virtually all trade policy simulation models. However, unit-value indexes have been criticized especially by Irving B. Kravis and Robert E. Lipsey (1974). To examine the effect of using unit-value indexes on estimates of disaggregated import-demand elasticities, this paper compares regression results using unit-value indexes with results using U.S. Bureau of Labor Statistics import-price indexes for several detailed trade categories based on quarterly data for 1978-88. Results show that using unit-value indexes does not greatly affect estimated import-demand elasticities. Copyright 1991 by MIT Press.