The determinants of R&D persistence in SMEs

This paper analyses the sources of persistence in conducting R&D activities by SMEs. The data used is a panel of Spanish manufacturing firms drawn from the Survey of Business Strategies (ESEE), for the period 1990-2011. We estimate discrete time proportional hazard models accounting for firm observed and unobserved heterogeneity. Our results are consistent with a process of learning associated with the accumulation of R&D capital and with a self-sustained effect of engagement in R&D activities. In addition, we obtain that persistence in R&D in SMEs is also related to the success-breeds-success, sunk costs and demand-pull hypotheses. Finally, our findings also uncover some interesting differences in the underlying drivers of R&D persistence of SMEs as compared to their larger counterparts.