Poverty Measures
computes the poverty of an (income) vector according to the specified poverty measure
pov(x, k, parameter = NULL, type = c("Watts", "Sen", "SST", "Foster"), na.rm = TRUE)
Watts(x, k, na.rm = TRUE)
Sen(x, k, na.rm = TRUE)
SST(x, k, na.rm = TRUE)
Foster(x, k, parameter = 1, na.rm = TRUE)x |
a vector containing at least non-negative elements |
k |
a constant giving the absolute poverty line |
parameter |
parameter of the poverty measure (if set to |
type |
character string giving the measure used to compute poverty coefficient must be one of the strings in the default argument. Defaults to "Watts". |
na.rm |
logical. Should missing values ( |
pov is just a wrapper for the poverty measures of
Watts, Sen, SST, and Foster
(Foster / Greer / Thorbecke). If parameter is set to NULL the
default from the respective function is used.
Foster gives for parameter 1 the headcount ratio and for
parameter 2 the poverty gap ratio.
the value of the poverty measure
Foster, J. E. (1984). On Economic Poverty: A Survey of Aggregate Measures. Advances in Econometrics, 3, 215–251.
Shorroks, A. F. (1995). Revisiting the Sen Poverty Index. Econometrica, 63(5), 1225–1230.
Zheng, B. (1997). Aggregate Poverty Measures. Journal of Economic Surveys, 11, 123–162.
# generate vectors (of incomes) x <- c(541, 1463, 2445, 3438, 4437, 5401, 6392, 8304, 11904, 22261) y <- c(841, 2063, 2445, 3438, 4437, 5401, 6392, 8304, 11304, 21961) # compute Watts index with poverty line 2000 pov(x, 2000) pov(y, 2000) # compute headcount ratio with poverty line 2000 pov(x, 2000, parameter=1, type="Foster") pov(y, 2000, parameter=1, type="Foster")
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