This data set has been derived from the Quarterly Interview Survey of the
Consumer Expenditure Survey (CES) undertaken by the U.S. Department of Labor,
Bureau of Labor Statistics and is available at
http://econ.lse.ac.uk/courses/ec220/G/iedata/ces/ where also more details about
this survey can be found. The original data set comprises 869 households in 34
variables of which one is unique ID, five characterize the size of the
household, further 6 variables contain other characteristics of the household
like age, education ethnicity, etc. and 22 variables represent the household
expenditures. We will consider a reduced set of only 8 expendature variables.
This reduced data set was analyzed by Hubert at al. (2009)in the context of
PCA and the first step
of the analysis showed that all variables are highly skewed.
They applied the robust PCA method of Serneels and Verdonck based
on the EM algorithm, since some of the data are incomplete.
Usage
data(ces)
Arguments
Format
A data frame with 869 observations on the following 8 variables:
EXP
Total household expenditure
FDHO
Food and nonalcoholic beverages consumed at home
FDAW
Food and nonalcoholic beverages consumed away from home
Hubert, M, Rousseeuw, P.J. and Verdonck, T., (2009). Robust PCA for skewed data and its outlier map,
Computational Statistics & Data Analysis, 53, 6, pp. 2264-2274