An evaluation of universal vouchers as a demand-side subsidy to change primary care utilization: A retrospective analysis of longitudinal services utilisation and voucher claims data from a survey cohort in Hong Kong

•Undifferentiated voucher scheme subsidises elderly to visit private primary care providers.•Public services utilisation and voucher-transaction data from a survey cohort were analysed.•Using voucher was not associated with a reduction in public services utilization.•Vouchers were mainly used for ac...

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