The Demand-Driven Acquisition (DDA) model has emerged as JSTOR's most popular ebook model. Libraries use DDA to meet patrons' needs by offering access to a wider variety of titles, and to ensure that funds are spent on titles that are used. JSTOR has made it easy to get started with DDA by developing tools to predict and control costs. In this 30-minute webinar, we’ll share what we’ve learned about making DDA successful and easy to implement for all types of libraries. We'll also discuss recommendations from current library participants, and there will be time for questions.