WITS贸易数据库的介绍:
The World Integrated Trade Solution (WITS) is a software jointly developed by UNCTAD and the World Bank. WITS offers a user-friendly data view interface that provides access to several trade databases covering imports, exports and protection data (tariff and non-tariff measures currently available in TRAINS) over time. WITS contains a simulation ‘toolkit’ that assesses the impact of various trade policy scenarios in terms of trade and welfare effects, among various other economic indicators.