The difference in the shares of renewable energy in total primary energy supply among OECD countries is immense. We attempt to identify some key factors that may have driven this difference for renewable energy in general and bioenergy in particular. We found that besides country-specific factors, gross national product (GDP) and renewable energy and bioenergy market deployment policies have significant and positive impacts on the per capita supply of both renewable energy and bioenergy in OECD countries. R&D expenditures, energy prices, CO(2) emissions, and other energy policies are statistically insignificant in terms of their impact on renewable energy and bioenergy supply. However, this does not necessarily mean that they are not potential drivers for renewable energy and bioenergy, but rather suggests that their magnitudes have not been big enough to significantly influence energy supply based on the historical data from 1994 to 2003. These findings lead to useful policy implications for countries attempting to promote renewable energy and bioenergy development. (C) 2011 Elsevier Ltd. All rights reserved.