In Maryland, child care subsidies (vouchers) help low-income families who are working, in job training, or obtaining education pay for child care. Subsidized arrangements tend to be short: From 2007-2014, half of all subsidized arrangements had ended within 21 weeks. Given the importance of stable care for children's development, the short length of subsidized arrangements may be a cause for concern. This study examines center-based child care arrangements that were subsidized through Maryland's Child Care Subsidy Program. We investigate whether child care arrangements at accredited child care centers--where providers met a set of standards based on research and best practices--were longer (or shorter) than arrangements at non-accredited child care centers. Using propensity score techniques, comparable groups of accredited and non-accredited center-based arrangements were created and compared. (author abstract)