数据来源于：世界银行（World Bank）公布的全球治理指标数据库（WGI）

有一栏的指标的取值范围区间为-2.5~2.5，我就是用的那一栏。

Estimate        Estimate of governance (ranges from approximately -2.5 (weak) to 2.5 (strong) governance performance)

StdErr        Standard error reflects variability around the point estimate of governance.

NumSrc        Number of data sources on which estimate is based

Rank        Percentile rank among all countries (ranges from 0 (lowest) to 100 (highest) rank)

Lower        Lower bound of 90% confidence interval for governance, in percentile rank terms

Upper        Upper bound of 90% confidence interval for governance, in percentile rank terms

楼主在处理WGI指数的缺失值是怎么处理的呀？

http://info.worldbank.org/governance/wgi/

https://info.worldbank.org/gover ... ocuments#docReading