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Pareto-improving Immigration in the Presence of Social Security

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  • Hisahiro Naito

Abstract

The effect of accepting more immigrants on welfare in the presence of a pay-as-you-go social security system is analyzed theoretically and quantitatively. First, it is shown that if initially there exist intergenerational government transfers from the young to the old, the government can lead an economy to the (modified) golden rule level within a finite time in a Pareto-improving way by increasing the percentage of immigrants to natives (PITN). Second, using the computational overlapping generation model, I calculate both the welfare gain of increasing the PITN from 15.5 percent to 25.5 percent and years needed to reach the (modified) golden rule level in a Pareto-improving way in a model economy. The simulation shows that the present value of the Pareto-improving welfare gain of increasing the PITN comprises 23 percent of the initial GDP. It takes 112 years for the model economy to reach the golden rule level in a Pareto-improving way.

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  • Hisahiro Naito, 2014. "Pareto-improving Immigration in the Presence of Social Security," Tsukuba Economics Working Papers 2014-003, Faculty of Humanities and Social Sciences, University of Tsukuba.
    • Handle: RePEc:tsu:tewpjp:2014-003
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