With inputs of labour and capital slowing, sustaining high growth rates in Korea will increasingly depend on total factor productivity gains, which are in turn driven to a large extent by innovation. While a number of Korean firms are at the world technology frontier in areas such as ICT, the diffusion of technology to lagging sectors is a priority to sustain growth. This paper recommends policies to improve the science and technology system by upgrading the R&D framework, in part through closer linkages between firms, universities and the government, and enhanced intellectual property right protection. Strengthened competition, particularly in the service sector, is needed to promote the diffusion of new technologies. Innovation also requires policies to ensure the supply of high-quality human capital through reforms of tertiary education. This requires a restructuring of the university system through increased competition and deregulation, as well as additional financial resources to improve quality. This Working Paper relates to the 2005 OECD Economic Survey of Korea (www.oecd.org/eco/surveys/korea). (A bibliography is included. Contains 34 footnotes, 12 figures, 5 boxes and 4 tables.)