Knowledge management in knowledge intensive business firms: A study of advertising agencies in Turkey This study aims to explore the knowledge related factors affecting the performances of knowledge intensive business firms. As an important strategic driver of today's economy, knowledge management especially in knowledge-intensive businesses requires a detail investigation (Grant, 1996). By conducting a case study on six advertising agencies operating in Turkey, each representing a different performance level and ownership status, methods of knowledge gathering, sharing, and accumulation in knowledge intensive business firms are examined and the knowledge related factors that may help to increase competitiveness of these firms are explored. The results indicate that the nature of ownership is a strong determinant of using knowledge in knowledge intensive businesses. In addition, accumulating knowledge by getting experienced in different industries and serving for different clients may become a competitive advantage for these firms.