A product exhibits personal fit uncertainty when its consumers have idiosyncratic and uncertain values for it. Often a consumer can learn her long-run value quickly by obtaining the good for a trial period. Money back guarantees of satisfaction are commonly used to lower the cost to consumers of...

A buyer can learn her value for a returnable experience good by trying it out, with the option of returning the good for whatever refund the seller offers. Sellers tend to offer a “no questions asked” refund for such returns, a money back guarantee. The refund is often too generous,...

Chamley (1986) and Judd (1985) showed that, in a standard neoclassical growth model with capital accumulation and infinitely lived agents, either taxing or subsidizing capital cannot be optimal in the steady state. In this paper, we introduce innovation-led growth into the Chamley-Judd...