The poverty, in welfare economics, is understood as a situation of privation of goods. In one hand, poverty can be understood in way entirely related with the income privation. This approach has the advantage to allow an easy mensuration, for the definition of poverty lines that indicate the...

The paper shows how to compute the elasticities of poverty measures (the poors head-count ratio, Sen’s poverty index and the measure of Foster, Greer and Thorbecke) in relation to the mean income (µ) and in relation to the Gini index (G), assuming that the income distribution is lognormal,...