Firms engage in social responsibility activities for diverse reasons. This study focuses on understanding firms' instrumental motivations for engaging in socially responsible activities. We suggest that the instrumental motivations underlying firms' corporate social responsibility engagement are associated with their market, learning, and risk-related behaviors; thus, we identify market orientation, learning orientation, and risk-taking attitudes as three constructs that influence firms' CSR engagement. This research was conducted in the Norwegian firewood sector, in which CSR expectations are high and in which we (...) expect CSR engagement to be encouraged by both instrumental and normative motivations. The firms in this study are micro-firms with fewer than 10 employees and represent an important but highly neglected segment of firms in CSR research. Data obtained from 230 firms were analyzed using structural equation modeling. Our results indicate that market orientation, learning orientation, and risk-taking attitudes affect social responsibility toward different stakeholder groups in different ways. In some cases, the size and age of firms also affect these relationships. (shrink)