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On the Growth and Welfare Effects of Defense R&D

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Author Info
Chu, Angus C.
Lai, Ching-Chong

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Abstract

In the US, defense R&D share of GDP has decreased significantly since 1960. To analyze the implications on growth and welfare, we develop an R&D-based growth model that features the crowding-out and spillover effects of defense R&D on civilian R&D. The model also captures the effects of defense technology on (i) national security resembling consumption-type public goods and (ii) aggregate productivity via the spin-off effect resembling productive public goods. In this framework, economic growth is driven by market-based civilian R&D as in standard R&D-based growth models and government-financed public goods (i.e., defense R&D) as in Barro (1990). We find that defense R&D has an inverted-U effect on growth, and the growth-maximizing level of defense R&D is increasing in the spillover and spin-off effects. As for the welfare-maximizing level of defense R&D, it is increasing in the security-enhancing effect of defense technology, and there exists a critical degree of this security-enhancing effect below (above) which the welfare-maximizing level is below (above) the growth-maximizing level.

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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 16325.

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Date of creation: Nov 2009
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Handle: RePEc:pra:mprapa:16325

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Related research
Keywords: defense R&D; public goods; economic growth; social welfare;

Find related papers by JEL classification:
O38 - Economic Development, Technological Change, and Growth - - Technological Change - - - Government Policy
H41 - Public Economics - - Publicly Provided Goods - - - Public Goods
H56 - Public Economics - - National Government Expenditures and Related Policies - - - National Security and War

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