In this paper we report upon a first empirical exploration of the relative efficiency of innovation development by product users vs. product producers. In a study of over 50 years of product innovation in the whitewater kayaking field, we find users in aggregate were approximately 3X more...

Household R&D (or household innovation) is an important source of innovation that has to date been largely overlooked in research related to national accounts. Indeed, it is not currently counted as investment in the literatures on household production and human capital. This paper develops time...