Do firm's sector and size influence on the degree of inbound open innovation?

The aim of this paper is to analyse whether degree of inbound open innovation (IOI) depending on the size and sector firm. A sample of small, medium and large-size firms from the manufacturing and service sectors have been selected. A cluster analysis has been developed to classify firms in three groups. We have found that companies in manufacturing sectors and that are small and medium sized are the most likely to have low or medium degrees of IOI; while companies in the service sector and that are large normally have the highest degrees of IOI. Secondly, the analysis carried out has demonstrated that companies with greater degrees of IOI are the most innovative in terms of product and process; they are the firms that buy more R%D services and usually cooperate with other organisations to develop R%D and innovation activities.