5. Conclusions and limitations
The literature on the relationship between R&D and financial performance at firm level is inconclusive. Some studies (e.g. Xu & Tang, 2010) report a positive relationship, whereas others (e.g. Lantz & Sahut, 2005; Li et al., 2008) find a short-term negative relationship between R&D investments and financial return.Methodological issues with regard to the use of indicators (Klingenberg et al., 2013) and the time-frame under consideration (Latham & Braun, 2009; Pearce & Michael, 2006) turn out to be important determinants to explain these contrasting findings.