informal user group. High-performance windsurfing involves acrobatics such as jumps and Author: Eric von Hippel Copy Quote More from Eric von Hippel “the Sources of Innovation: The Case of Scientific Instruments." Research Policy…” “1978 Jurgen Honscheid came over from West Germany for the first Hawaiian World …” “Then I remembered the "Chip," a small experimental board we had built with foot…” “high-performance windsurfing techniques and equipment in Hawaii by an informal …”