The Effects of Pricing Waste Generation: A Synthetic Control Approach

Aufsätze referiert extern - Web of Science

Matheus Bueno, Marica Valente

In: Journal of Environmental Economics and Management 96 (2019), S. 274-285


To internalize pollution externalities into household waste generation, Unit Pricing Systems (UPS) have been adopted worldwide. This paper evaluates the causal effects of a UPS on the disposal of municipal solid waste in Trento, Italy. Using a unique panel dataset of monthly waste generation in Italian municipalities, we employ the synthetic control method, which allows us to account for possible time-varying effects of unobservables. Our results show that the policy was effective, with a significant decrease of the priced waste stream, unsorted waste, by 37.5%. This effect seems to be largely driven by behavioral changes towards waste avoidance (−8.6%) and possibly by a smaller increase in recycling (+6.1%). By comparing these results to those obtained by a difference-in-differences approach, we show that failing to account for time-varying effects of unobservables may lead to a mismeasurement of policy effects.

Marica Valente

Doktorandin in der Abteilung Energie, Verkehr, Umwelt

Keywords: Waste generation, Unit pricing, Synthetic controls, Policy endogeneity, Selection on unobservables