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The Effects of Gift Vouchers and Environmental Certificates on the Demand for a Collective DRT System

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Document pages: 38 pages

Abstract: This paper analyzes in a large-scale field experiment (N = 1,425) whether gift vouchers stimulate the demand for DRT. This scenario is compared to a situation where customers receive environmental certificates, which report the saved carbon dioxide as a consequence of the bus ride. In our two treatments, the gift vouchers and the environmental certificates could be gained by reaching to a certain threshold of rides with the DRT service (EcoBus). The data show that gift vouchers excellently work to increase the demand for DRT. EcoBus rides increased by 83 in the intervention phase. Interestingly, the certificates also have a positive effect and lead to an increase of 65 . However, gift vouchers outperform them, as the increase in rides is attenuated in the end of the certificate-treatment phase.

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