✔ 最佳答案
If you want to learn about CURRENT economies of the world, you should not buy any BOOKS which information has been outdate at least for 1.5~2 years, you have to read weekly & monthly magazines & journals about the latest development of world economy.
or surfing the information on the web site of The World Bank for free, mostly its information is fresh and within the current year.
http://www.worldbank.org/