TABLE 2.
Variables related to the IC framework in each paper.
| IC dimension | Terms, variables, and dimensions | References |
| Human capital | Knowledge sharing (perceptions and beliefs) | Mohd Noor et al., 2015 |
| Board information (availability and use) | Zhu et al., 2016 | |
| Volunteer motivation, Volunteer efficacy | Cady et al., 2018 | |
| Narratives | Benevene et al., 2018 | |
| Narratives | Bontis et al., 2018 | |
| Levels of staff capacity, training, and roles | Vakharia et al., 2018 | |
| Relational capital | Interorganizational relationships | Misener and Doherty, 2013 |
| Beneficiary participation | Mohd Noor et al., 2015 | |
| Interorganizational relationships | Wemmer et al., 2016 | |
| Interorganizational relationships | Álvarez-González et al., 2017 | |
| Narratives | Benevene et al., 2018 | |
| Narratives | Bontis et al., 2018 | |
| Structural/organizational capital | Collaborative culture | Mohd Noor et al., 2015 |
| Board strategic involvement | Zhu et al., 2016 | |
| Narratives | Benevene et al., 2018 | |
| Narratives | Bontis et al., 2018 |