TECHNICAL UNIVERSITY BERGAKADEMIE FREIBERG TECHNISCHE UNIVERSITÄT BERGAKADEMIE FREIBERG FACULTY OF ECONOMICS AND BUSINESS A DMINISTRATION FAKULTÄT FÜR WIRTSCHAFTSWISSENSCHAFTEN Michael Fritsch Christian Schwirten R&D cooperation between public research institutions – magnitude, motives and spatial dimension F F R E I B E R G R E I B E R G W W O R K I N G O R K I N G P P A P E R S A P E R S F F R E I B E R G E R R E I B E R G E R A A R B E I T S P A P I R B E I T S P A P I E R E E R E # 11 # 11 2000 2000