Better data on povertyindicators, in particular at the subnational level, are also needed ifwe are to assess the true effects of the interventions designed to meetthe UN Millennium Development Goals of halving poverty by 2015 (see Nature 446, 347; 2007).

• 亚民族水平上的贫困指标是更好的资料，有助于我们了解美国2015年千年计划发展目标中关于贫困减半计划的真正效果。