Czarnitzki, Dirk; Binz, Hanna L. - Zentrum für Europäische Wirtschaftsforschung (ZEW) - 2008
This study tests for financial constraints on R&D investment and how they differ from capital investment. To identify constraints in the access to external capital, we employ a credit rating index. Our models show that internal constraints, measured by mark-ups, are more decisive for R&D than...