Amid evidence that social ventures are rooted in entrepreneurs’ deeply-held values, we expect that persistence with start-up efforts will be greater for ventures with social as opposed to commercial purposes (H1). However, we also believe that motivation may play a pivotal role in this process. Given that motivation impacts the direction, intensity, and persistence of effort, entrepreneurial self- efficacy (ESE) should also be positively related to the amount of time individuals persist with start- up activities (H2). Moreover, because individuals often construct their self-efficacy beliefs from their affective states, we expect social entrepreneurs to have greater ESE than commercial entrepreneurs (H3). We believe this heightened level of ESE will partially mediate the relationship between social purpose and persistence (H4).