ls, this is specific information in econometrics, and very nice question. They are used to proxy some variables, such as living standard. But LZ, ls is correct, if this question is so academic, then maybe it is better to ask it somewhere else, as this forum is mainly for tourists. I know all the answers to this question but it is not good to paste it here ba...
且不说每个地方都不一样 就说同一个地方不同档次的店 价格还不一样
英国查ONS, 美国查BLS,真要做研究 上面海量的REPORTS
另外一贴2发的,再看见一个就删帖的
这个大都是均价,大部分商品都有特价的时候
要不真成在论坛伸手要饭的了
要不真成在论坛伸手要饭的了