Jang, Show-Ling; Tsai, Yen-Ting; Chen, Jennifer - In: Applied Economics Letters 15 (2007) 4, pp. 323-326
This article analyses firms' dynamic behaviours of patent persistence and technology proximity in innovation activities for United States, Japan, South Korea and Taiwan during 1990-2003. We find that on average, the persistency of Japanese firms in sustaining their innovative activities is...