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The purpose of this paper is to investigate the association between the strength of intellectual capital (IC) and small- and medium-sized enterprise (SME) innovation performance.

Primary data of 150 SMEs belonging to manufacturing medium-high tech industries were collected through a survey. The methodology consists of a confirmatory factor analysis and a cluster analysis, complemented by a t-test, to assess whether there is a significant difference in terms of innovation performance of SMEs characterized by a different strength of IC.

Overall, the findings show that SMEs of the sample can be divided into two groups characterized by a different strength of IC, and those SMEs disclosing a higher strength of IC, in terms of human capital, innovation capital and relational capital, exhibit a significantly higher radical and incremental innovation performance.