摘要：This study investigates the impact of domestic and foreign currency-valued exchange rate volatility on the export and import demand functions with reference to Pakistan’s trading partners. We use GARCH-based exchange rate volatilities and the least-squares dummy variable technique with fixed-effects estimation to measure the volatility impact on both demand functions. The study evaluates a series of exchange rates from 1970:01 to 2009:12 to compare the long-run impact of volatility with that of the short run. The results show that, when Pakistan employed the US dollar as the vehicle currency with its trading partners, volatility discouraged both imports and exports. In contrast, both the import and export demand functions remained unaffected by volatility distortions when Pakistan traded with its developing partners using bilateral exchange rates valued in domestic currency terms. In policy terms, this implies that Pakistan should opt for direct domestic currency when trading with middle- and low-income countries
