Learning, Internal Research, and Spillovers: Evidence from a Sample of Industrial R&D Laboratories
The paper presents new evidence on the practice of industrial research and development (R&D), specifically the allocation between learning and internal research, and the role of outside knowledge, as represented by R&D spillovers in reshaping this allocation.
Link
http://www.rpi.edu/dept/economics/www/workingpapers/rpi0409.pdf