1. Even dwarfs started small: liabilities of age and size and their strategic implications;Aldrich,1986
2. Collective invention;Allen;Journal of Economic Behaviour and Organization,1983
3. Estimating nonresponse bias in mail surveys;Armstrong;Journal of Marketing Research,1977
4. Markets for technology: the economics of innovation and corporate strategy;Arora,2001
5. The relative effectiveness of patents and secrecy for appropriation;Arundel;Research Policy,2001