This document summarizes a study of incentives for participants in digital history projects. It finds that while the official incentive is to build new tools for historical research, the realities are different for each community of practice (CoP). The research CoP prioritizes their own thesis work over the tool. The technology CoP focuses on building interfaces rather than ensuring the tool is stable for research. And the tool CoP sees the project as a way to prove concepts and gain continued funding. As a result, the project functions more as a boundary object that coordinates these different incentives rather than achieving the goal of a finished tool for historians to use. There are open questions around whether historians can do big data analysis before tools are ready, and how