We analyze Ramsey optimal monetary policy in a New-Keynesian model withsearch and matching frictions featuring (i) training costs due to skill loss fromlong-term unemployment and (ii) endogenous growth through learning-by-doingexternalities. In a simplified two-period version of the model, the...

We present a sticky-wage model with two types of labors: while worker's labor contributes to current production, researcherís work helps develop new ideas to add to firm's knowledge capital that enhances its productivity for many periods. The long-lived effect of knowledge capital on...