精选优质文档- 倾情为你奉上 专心-专注-专业 Problems and Answers to Chapter 2 Q1: Canada and Australia are (mainly) English-speaking countries with populations that are not too different in size (Canadas is 60 percent larger). But Canadian trade is twice as large, relative to GDP, as Australias. Why should this be the case? 加拿大和澳大利亚都是英语国家，两国的人口规模也相当（加拿大多 60%） ，但是相 对各自的 GDP 而言，加拿大的贸易额是澳大利亚的两倍，为什么如此？ A1:According to Gravity Model, GDP is not the only factor to explain the volume of trade between two countries, becaus
