Data on whether or not households in Bangladesh changed the wells that
they were using.
Usage
Wells
Format
A data frame with 3020 observations on the following 5 variables.
switch
whether or not the household switched to
another well from an unsafe well: no or yes.
arsenic
the level of arsenic contamination in the
household's original well, in hundreds of micrograms per liter; all
are above 0.5, which was the level identified as “safe”.
distance
in meters to the closest known safe well.
education
in years of the head of the household.
association
whether or not any members of the household
participated in any community organizations: no or yes.
Details
The data are for an area of Arahazar upazila, Bangladesh.
The researchers labelled each well with its level of arsenic and an
indication of whether the well was “safe” or “unsafe.” Those using unsafe
wells were encouraged to switch. After several years, it was determined
whether each household using an unsafe well had changed its well.
These data are used by Gelman and Hill (2007) for a logistic-regression example.