按人口来定这个城市的权重，还按建筑面积来定新建和现有房产的权重，经济学人试图通过这种方法来重新得出已被弃用的房价指数（如图所示）。
Weighting the cities by population , and weighting the mix of new and existing properties by floorspace , The Economist has tried to rebuild China 's abandoned house-price index ( see chart ) from its constituent parts .
房产经济学