IPR protection vs. innovation subsidy: What is the choice for the emerging South?

In this paper, we use a classical variety-expanding growth model to analyze the policy or institutional-arrangement choice for the Southern government who faces the tradeoff between imitating Northern innovation without cost and encouraging domestic innovation. We assume that the Southern government fully respects the principle of non-discrimination and hence treats both imitations, i.e., imitation of Northern innovation and imitation of domestic innovation, equally. For a given state of the economy, we explicitly and uniquely establish an optimal degree of intellectual property rights (IPR) protection for the South. Then, we find that there is a complementary relationship between optimal IPR protection and the innovation subsidy policy, which implies that they form an effective policy mix, hence offering a useful insight for avoiding ineffective policy conflicts widely occurred in real-world economies.