KNOWLEDGE COMBINATION MODELING: THE MEASUREMENT OF KNOWLEDGE SIMILARITY BETWEEN DIFFERENT TECHNOLOGICAL DOMAINS HIROKO NAKAMURA, SHINJI SUZUKI Center for Aviation Innovation Research (CAIR), The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan, e-mail; techhn@mail.ecc.u-tokyo.ac.jp, Tel; +81-3-5841-0744 ICHIRO SAKATA Innovation Policy Research Center, The University of Tokyo YUYA KAJIKAWA Graduate School of Innovation Management, Tokyo Institute of Technology Abstract This paper proposes the DB-Combination model that considers three different knowledge combinations in depth (D) and breadth (B) based on similarities of two technological knowledge domains. We also investigate three methodologies A1, A2 and A3 to highlight the three knowledge combinations. To © 2014. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/