1. What causes workers to retire before they plan? Author(s): Munnell, Alicia H., authorSanzenbacher, Geoffrey T., authorRutledge, Matthew S., author Publication: Chestnut Hill, MA : Center for Retirement Research at Boston College, September 2015 Subject(s): Retirement -- statistics & numerical dataHealth StatusInsurance, HealthSocioeconomic FactorsTime FactorsHumansUnited States