Journal of Applied Mathematics and Decision Sciences
Volume 2006 (2006), Article ID 38358, 18 pages
doi:10.1155/JAMDS/2006/38358
Abstract
Ecological analysis involves analysing aggregate data
for groups of individuals to make inferences about relationships
at the individual level. Often the results of such analyses give
badly biased estimates. This paper will consider the sources of
bias in linear regression analysis using aggregate data. The role
of variation of the individual level relationships between groups
and the consequent within-group correlations and how these are
related to auxiliary variables that characterise the differences
between groups is considered. A method of adjusting ecological
regression for the effects of auxiliary variables is described and
evaluated using data from the 1991 Australian Census.