哈特法案 海牙規則 海牙威士比規則 漢堡規則 UNCITRAL海上貨物運送公約草案 基本義務 免責條款 The Harter act The Hague rule The Hague Visby rules The Hamburg rules The UNCITRAL draft convention on carriage of goods by sea The exemption clauses Actual fault Constructive fault Negligence Liability Strict liability Absolute liability The economic analysis The game theory The supply-demand theory