Problems of operationalizing the concept of a cost-of-living index



Table 6: percentage of observations not violating the monotonicity and con-
cavity conditions

data set

model

monotonicity

concavity

fitted

oberserved

1988

AIDS

100%

0%

0%

QUAIDS

100%

0%

0%

1993

AIDS

100%

0.158%

0%

QUAIDS

100%

1.738%

0%

1998

AIDS

100%

7.635%

0.246%

QUAIDS

100%

5.665%

0.248%

2003

AIDS

100%

5.068%

1.351%

QUAIDS

100%

2.703%

3.378%

44



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