期刊名称：Discussion Papers / School of Business, University of New South Wales
出版年度：2007
卷号：2007
出版社：Sydney
摘要：Panel hedonic comparisons can be made using the region-time-dummy
method. This method is a natural extension of the well known time-dummy and
region-dummy methods which have been used extensively in the hedonic literature.
We show that these methods are all affected by substitution bias, which can seriously
distort their results. We propose an alternative approach that is free of
substitution bias which builds up panel comparisons from bilateral building blocks
using the hedonic imputation method. This approach is very flexible. We consider
a number of variants on this method, all of which are likely to be improvements
on the unconstrained region-time-dummy method. We illustrate our findings using
data for 14 regions in Sydney over a six year period. We find clear evidence of bias
in the region-time-dummy results as well as in simple average measures such as the
median that fail to adjust for quality change. For these reasons we favor the hedonic
imputations approach.
