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A
firm’s R&D investments can be higher when it both sends and receives
spillovers than when it only receives them.
Firm’s
symmetric R&D investments can increase with spillovers when products are
not close substitutes and thus competition is not fierce.
Firms
decide to let their R&D knowledge flow to their competitors when the
spillovers are strong enough and competition is not too fierce.
Public
policy should promote the dissemination of technological knowledge.
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