Recovering Comparable Poverty Estimates in Côte d'Ivoire
针对科特迪瓦1985至2008年贫困率上升四倍的说法，因调查设计多次修改而存疑，本文通过构建共同消费篮子并采用两阶段矩估计方法，重新估算贫困人口比例，发现调整后的趋势显示贫困率仅相差两个百分点，且经稳健性检验支持。
Recent studies on Côte d'Ivoire show a four-fold increase in poverty rates between 1985 and 2008. However, multiple revisions in the survey design questions the validity of the Ivorian poverty trend. In this paper, we follow two simple steps to recover the comparable poverty trend. First, we construct a common consumption basket over time. Second, we follow a two-stage method of moments framework (Tarozzi, 2007) to re-estimate poverty headcounts. On average, the adjusted trend shows a two percentage point difference in poverty rates from 1985 to 2008. A number of robustness checks provide robust support to this revised poverty trend.