Abstract
This paper analyzes how changing the expected length of intellectual property (IP) protection T affects economic growth and the welfare of rich and poor consumers. The analysis is based on a product-variety model with non-homothetic preferences and endogenous markups in which, in accordance with empirical evidence, rich households consume a larger variety of goods than poorer ones. It is shown that growth is independent of T when there is perfect equality and that T can only substantially affect growth when there is a sufficient degree of inequality. When there is inequality, an increase in T that is applied to both new and previously granted innovations increases growth. A reduction in T that affects only new, but not previously granted innovations, can increase growth if wealth inequality is sufficiently high. In the case where increasing T increases growth, poorer households prefer a shorter length of protection T than richer ones.
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