Patents, prizes, government grants, and R&D tax incentives are ways to reward and incentivize innovation. One of the ways in which these schemes differ is the timing of the reward. Patent holders are rewarded after the product is developed and patented over the course of 20 years (length of the patent) but only if the product is commercialized (since rents are earned from the market). Prize-winners are awarded according to the competition rules although it is almost always after some sort of result. Government funding and tax incentives is granted throughout or before the development period and often before any final results are produced. R&D tax incentives have a slight delay from the process of getting through the tax system to realize those benefits.

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