An experimental dynamic public goods game with carryover

► We examine subject decision making in a repeated voluntary contributions mechanism with two stages. ► 'Carryover' between stages is introduced by connecting second stage endowments or MPCR levels to first stage decision making. ► Carryover increases first stage contributions, but does not affect efficiency over two stages due to the high potential payoffs associated with complete contributions in stage 2. ► Our results also indicate that endowments and MPCR levels are important determinants of subject decision making.