This paper asks whether or not commuting expenses should be tax deductible.
In order to answer this question, a simple multiregion model of (im-)perfe
ct household and worker mobility is employed. The paper shows that deductib
ility is clearly inefficient only if households are perfectly mobile and if
households cannot choose their place of work. If the region of work is not
exogenously fixed, commuting expenses should be deductible at more than 10
0%. even if households choose simultaneously the place of work and the regi
on of residence, and even if tax rates are nor standardized within the fede
ration. (C) 2000 Academic Press.