- We conducted a field study with 154 apartments investigating side effects of an environmental campaign

- Study participants exposed to the water conservation campaign increased their electricity consumption relative to the control group

Isolated environmental campaigns focusing on defined target behaviors are rolled out to millions of households every year. Yet it is still unclear whether these programs trigger cross-domain adoption of additional environment-friendly behaviors (positive spillover) or reduced engagement elsewhere. A thorough evaluation of the real net performance of these programs is lacking. This project investigates whether positive or perverse side effects dominate by exemplifying the impact of a water conservation campaign on electricity consumption.

The study draws on daily water (10,780 data points) and weekly electricity (1,386 data points) consumption data of 154 apartments in a controlled field experiment at a multifamily residence.

Residents who received weekly feedback on their water consumption lowered their water use (6.0% on average), but at the same time increased their electricity consumption by 5.6% compared with control subjects. Income effects can be excluded. While follow-up research is needed on the precise mechanism of the psychological process at work, the findings are consistent with the concept of moral licensing, which can more than offset the benefits of focused energy efficiency campaigns, at least in the short-term.