This paper studies the dynamic adjustments of the intra- and inter-industry R&D spillovers and exogenous technical change effects on output growth and cost structures for Taiwanese electronics industries. A dynamic production modeling is built up to estimate R&D spillover effects among and within electronics industries to study the dynamic effects of intra- and inter-industry R&D spillovers and exogenous technical changes on output growth for Taiwanese electronics industries. The analysis is performed using the Taiwan government's industrial census of technological activities at the micro level with 2340 plants for the period 1987-1995. The empirical evidence shows the following. 1) Both intra- and inter-industry spillovers have more important contributions on the electronics industry output growth than its own R&D. And the inter-industry R&D spillovers have greater contribution on output growth than intra-industry R&D spillovers. 2) The adjustment speeds in quasi-fixed inputs-R&D and physical capital-are faster than in other high-technology industries in other studies, reflecting Taiwanese electronic industries may have better performance in facing environmental shocks. 3) All six electronics industries are showing significant increasing return to scale and progressing steadily in the growing stage during 1987-1995.