WHY Seattle Symposium on Policy Evaluation and Causal Inference November 10-11, 2025, in Seattle WA This is a Symposium focused on methods and implementation of causal inference methods, organized by Austin Nichols. The WHY Symposium is devoted to the use of causal inference methods in policy research. The Symposium features talks on methods and applied papers on a variety of topics. Sessions with presentations and discussion are mixed with opportunities for informal mingling both on site and at nearby locations in Seattle WA. See the Acknowledgements (p.19) in the Stata manual entry for hdidregress for some indication of the benefits of attending WHY symposia. Schedule Monday 10 November, 2025: Sessions 9am to 4pm and lunch at the Day 1 Bldg. 2121 7th Ave Seattle WA Tuesday 11 November, 2025: Sessions 9am to 4pm and lunch at the Day 1 Bldg. 2121 7th Ave Seattle WA Sign up Note there is a $100 fee for attendance; attendees must also plan their own transportation and hotel. Please sign up by August at this form. Attendance is capped at 40, and only accepted registrants may attend. Details A detailed schedule will be posted in October, but see past symposia below for a notion of what will be on it. Past symposia The first WHY Symposium, WHYKY in Kentucky, organized by Austin Nichols and Jose Manuel Fernandez, was co-sponsored by and the College of Business at the University of Louisville. The second WHY Symposium, organized by Austin Nichols in DC in 2022, was co-sponsored by and hosted by the National Academy of Social Insurance. The third WHY Symposium, in Park City in 2023, was organized by Adam Looney and Austin Nichols, and co-sponsored by and the University of Utah. The fourth WHY Symposium, in DC in 2024, was organized by Austin Nichols, and co-sponsored by .