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The Sen-Shorrocks-Thon (SST) index, also called the modified Sen Index, is a poverty index that combines the proportion of poor people, the depth of their poverty, and the poverty distribution among the poor into the poverty measure. It was proposed by Anthony Shorrocks as an extension of the pioneering work of Amartya Sen. As indicated in an article by Buhong Zheng, the index is identical to the limit of another modified Sen Index proposed by Dominique Thon. Thus, Kuan Xu and Lars Osberg call it the Sen-Shorrocks-Thon index.

The SST index is a weighted sum of the normalized poverty gaps of the poor. The poor with incomes further below the poverty line are given more weight in the poverty measure. The index consists of values between ...

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