Lights, camera ... income!: Estimating poverty using national accounts, survey means, and lights
Maxim Pinkovskiy, Xavier Sala-i-Martin 27 February 2014
How many people are poor worldwide? This column explains that the answer depends on whether one uses survey of national-accounts data to anchor country distributions of income. It then argues that night-time lights suggest that national accounts offer a better estimate. Developing world poverty may be as low as 4.5% in 2010, much lower than the path constructed by surveys.
How many people are poor, and how fast are they leaving poverty? The World Bank (Chen and Ravallion 2001, 2010) says that a quarter of the people in the developing world lived on an income of less than $1.25 a day (the threshold of absolute poverty defined by the lowest poverty lines in developing countries), down from about 40% in 1992.
Development Poverty and income inequality
GDP, surveys, satellite
More to do on measuring hunger
Joachim De Weerdt, Kathleen Beegle, Jed Friedman, John Gibson 18 February 2014
Whereas the Millennium Development Goal of reducing extreme poverty by half was achieved by 2010, the global hunger rate has only fallen by a third since 1990. Differences in survey design may account for part of this discrepancy. This column presents the results of a recent experiment in which households were randomly assigned to different survey designs. These different designs yield vastly different hunger estimates, ranging from 19% to 68% of the population being hungry.
One of the first Millennium Development Goals is to reduce hunger by half between 1990 and 2015. To date, the global hunger count has fallen slightly, from 1 billion in 1990–1992 to 870 million in 2010–2012 (Food and Agriculture Organization 2013). As a proportion of the world’s population, this is just a one-third fall in the hunger rate, from 19% to 13%. In contrast, the other highly visible Millennium Development Goal – reducing extreme poverty by half – was achieved by 2010.
Poverty and income inequality
development, Africa, Poverty, Millennium Development Goals, food, hunger, measurement error, surveys, Tanzania