"Understanding the performance of accelerators is important to a wide range of individuals and organizations: participating startups, accelerator managers and staff, investors, partners, donors, funders, and policymakers. Each of these stakeholders may have different priorities and objectives in their efforts to measure accelerators' performance and impact. This brief identifies considerations and potential metrics for evaluating accelerator performance. In addition to metrics related to the accelerator itself, it includes measures that assess the performance of startups, and changes in the regions in which accelerators are located."