13 pages, rev. Jun. 2021. "Despite variability in the design of cash balance and DB-DC combination plans, well-designed plans generally contain the core features of retirement plan design known to best meet the human resources and retirement policy objectives of state and local governments: mandatory participation, shared financing between employers and employees, pooled assets invested by professionals, targeted income replacement with survivor and disability protection, and a benefit that cannot be outlived. This brief discusses the degree to which these core design features have been retained in public sector hybrid plans."