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Edward R. Morey, Kathleen Greer Rossmann, Lauraine G. Chestnut and Shannon Ragland INTRODUCTION Numerous elicitation methods have been employed to gather stated preference data for use in estimating the value of environmental goods. The most commonly used methods have been various forms of the contingent valuation method (CVM), for example payment cards, open-ended willingness-to-pay (WTP) questions, and referenda. More recently, choice experiments (CEs) have been used to gather valuation data for environmental goods for which the value of the good is primarily direct use. This study uses pairwise choice experiments to estimate the total value (direct and passive use) of an environmental good. The CEs were contained in a survey administered in person in a group setting. This approach exploits many of the benefits of individual in person interviews, while maintaining a more consistent presentation of the information across respondents and lower implementation costs. This study estimates the benefits of reducing acid deposition injuries to an important set of cultural resources: the 100 outdoor marble monuments in Washington, DC. The reductions in injuries are presented as hypothetical preservation programs that mimic the likely range of injury reductions resulting from the reductions in sulfur dioxide (SO2) emissions required by Title IV of the 1990 US Clean Air Act Amendments. Group interviews were conducted in the Philadelphia and Boston metropolitan areas. The results indicate that, on average, households in these areas are willing to make a one-time payment of $33 to $69, depending on the level of preservation, to slow down the...