Effective Rates of Protection When Domestic and Foreign Goods Are Imperfect Substitutes: The Case of Thailand 5 May 20135 May 2013tdriUncategorizedImperfect Substitutes @en, Chalongphob Sussangkarn @en, Shanta Devarajan @en, Effective Rates @en Year1986-10 AuthorShanta Devarajan, Chalongphob Sussangkarn