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Optimal Taxation of Capital Income in Models with Endogenous Fertility

Centro Studi Luca d'Agliano Development Studies Working Paper No. 228

29 Pages Posted: 25 Jul 2007  

Alberto Petrucci

LUISS Guido Carli - Department of Economics

Date Written: May 2007


This paper studies the issue of the efficient taxation of capital income in intertemporal optimizing models with infinite horizons and endogenous population growth. We discover that, in the steady state, the optimal capital income tax is negative when the economy is closed. Instead, in a small open economy facing perfect capital mobility, the Chamley-Judd result of a zero tax rate is obtained if capital taxation is source-based; otherwise, income from wealth should be subsidized if taxation is residence-based. Moreover, we find that in our setup, taxing capital income with immediate expensing of capital expenditure may replicate the first-best equilibrium when labor is subsidized. Our findings, which depart substantially from those obtained in representative agent models with an endogenous labor supply, are to be ascribed to a wealth effect in the fertility choices that directly affects the pseudo-welfare function of the social planner.

Keywords: factor income taxes, Second-best analysis, endogenous population growth, Capital formation

JEL Classification: E62, H22, J22, O41

Suggested Citation

Petrucci , Alberto, Optimal Taxation of Capital Income in Models with Endogenous Fertility (May 2007). Available at SSRN: or

Alberto Petrucci (Contact Author)

LUISS Guido Carli - Department of Economics ( email )

Viale Romania, 32
Rome, 00197
+39 06 8522 5737 (Phone)
+39 06 8522 5949 (Fax)


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