This document summarizes a panel discussion on effective inclusionary zoning practices in four Massachusetts municipalities - Arlington, Cambridge, Groton, and Shrewsbury. It provides details on the mandatory or voluntary nature of each program, minimum project sizes that trigger affordability requirements, percentage of projects that must be affordable, affordability periods, maximum income levels, buyout policies, available incentives, total affordable units created to date, and contact information. Key recommendations included requiring comparable affordable housing rather than buyouts and ensuring requirements are flexible enough to work for each community.