This article examines if and why mechanisms exist at the individual citizen
level that may contribute to public sector growth - and whether such mecha
nisms can be altered through provision of information about the costs or pu
blic services. We test and find empirical support for the theory of fiscal
illusion according to which citizens underestimate the costs of public serv
ices and therefore demand more public spending than if they had been fully
informed. We also develop and find empirical support for a theory of asymme
trical illusions. This theory claims that producers and users of public ser
vices are more spending-minded than ordinary taxpayers - and that limited r
ationality contributes to this difference. However, the provision of inform
ation about the unit costs of public services can weaken these mechanisms o
f fiscal illusion and asymmetrical illusions. The test is based on tabular,
logit, and experimental analysis of survey data from Odense, a Danish city
with 175,000 inhabitants.