Measuring External Shocks to the City Economy: An Index of Export Prices and Terms of Trade
构建了1977-1992年美国196个大都市区的出口价格指数，作为衡量城市外部需求冲击的外生指标，避免了收入、就业等内生指标的因果模糊性，为学者和政策分析师提供了识别需求价格创新和贸易条件冲击的新工具。
This paper details the construction of an index of export goods prices (the Export Price Index or EPI ) for a panel of 196 metropolitan areas from 1977 to 1992. The EPI is an indicator of external demand shocks to the city economy which does not suffer from the causal ambiguity of the endogenous indicators such as income, employment or output. The creation of an index of aggregate export prices, the EPI , for the panel of areas provides both academicians and policy analysts with a new exogenous indicator that identifies demand price innovations and the terms of trade shocks to cities.