Non-monetary intervention to discourage consumption of single-use plastic bags

Abstract

Abstract The over-utilization of plastic bags has pushed governments to implement a mix of policy measures ranging from banning the bags altogether to charging a fee for them. However, these policies are often accompanied by unintended consequences. Paying for plastic bags, in particular, may crowd out the negative emotions tied to their harmful impact on the environment, and may be subject to a ‘rebound effect’. In a randomized controlled experiment, I tested four different treatments aimed at nudging or encouraging consumers to carry their own bag to the stores. Specifically, I tested the effects of changing the framing of the question regarding carrier bags at the checkout till in stores using a yes/no response format, in which the yes option corresponds to the desired behaviour. The treatment with the yes/no framing format was found to have as strong and significant an effect as a charge of 5 pence per bag on discouraging single-use plastic bag consumption.

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