A second study, the United Nations Development Program’s Human Development Report 2014, corroborates these findings. Every year, the UNDP publishes a ranking of countries by their Human Development Index (HDI), which incorporates other dimensions of wellbeing besides income, including health and education.
第二项研究是联合国发展计划署的2014年人类发展报告，该报告印证了第一项研究的发现。联合国发展计划署每年都要发布各国人类发展指数（HDI）排名，该排名考察包括健康和教育在内的各项除收入以外的福利。