PurposeSmall- and-medium sized enterprises (SMEs) significantly contribute to the success of platform-based innovation ecosystems (PIEs). However, less is known about their behaviors and behavioral intentions (BIs) toward participating in PIEs. Considering that SMEs' BIs directly influence their behaviors and reveal the underlying logic of their behaviors, this study, therefore, focuses on SMEs' BIs and explores the antecedents to reveal the rational effects on BIs of the participation.Design/methodology/approachAn extended framework is proposed to understand SMEs' BIs toward the participation and empirically tested with data from a sample of 189 Chinese SMEs based on partial least squares structural equation modeling (PLS-SEM).FindingsThe results show that (1) the framework has a good fit in the context of PIEs and a large predictability of SMEs' BIs toward the participation; (2) as expected, SMEs' BIs are directly positively affected by their attitudes (ATTs), subjective norms (SNs) and platform leaders (PLs), while indirectly positively influenced by perceived usefulness (PU) and ease and negatively influenced by perceived risks (PRs) via mediation effects and (3) surprisingly, BIs are directly negatively affected by platforms probably because of the potential collaborative risks based on platforms.Originality/valueThis study enriches PIE literature by focusing on complementors and proposing a framework of SMEs' BI toward joining PIEs, and it also expands the application of BI–behavior theories in the context of PIEs by offering a BI–behavior perspective to analyze the rational logic of SMEs' behaviors of participating to PIEs. Practically, the main findings not only benefit SMEs to better understand their BIs and to make a wise choice toward the participation, but provide implications for PLs to proactively design interventions for attracting SMEs’ complementors.
