Breyer, Christian; Birkner, Christian; Meiss, Jan; … - In: Energy Policy 62 (2013) C, pp. 1570-1580
evaluation of global corporate R&D investments is a challenging task due to unavailability or high scatter of precise data. Here … we present a top-down approach to estimate the current and global historic cumulated PV R&D investments based on … the PV market and are an excellent indicator to analyze R&D investments. With this approach, current annual corporate PV R&D …