The authors analyzed the five provinces of northwestern China using Theil indexes from the year 1996 to 2005 and meanwhile utilizing two indexes of total tourist income and its share in GDP.

• 利用旅游总收入和及其所占GDP的百分比2个测度指标，采用泰尔指数对1996-2005年西北5省（区）旅游经济差异变化进行了分析。