所谓榨菜指数,大意是,根据畅销全国的涪陵榨菜这几年在各地区销售份额变化情况,推断人口流动趋势。据媒体报道,此指数系中国发改委官员发明,他们还根据这个指标,将全国分为人口流入区和流出区两部分,针对两个地区的不同人口结构制定不同的政策。此外还有报道称:涪陵榨菜在华南地区销售份额由2007年的49% The so-called mustard index, to the effect that, according to the best-selling national Fuling mustard in recent years in various regions of the share of sales changes, inferred the trend of population movements. According to media reports, the index was invented by officials of China’s NDRC. According to this indicator, the index divides the country into two parts: population inflow area and outflow area. Different policies are formulated for different population structures in the two regions. In addition, there are reports that: Fuling mustard in southern China sales share from 2007 to 49%