How can firms support their customers' collaborative, social responsibility initiatives — and especially pro-environmental, firm—customer collaborations? Does corporate transparency affect customers' willingness to undertake pro-environmental collaborative programs? This study addresses these questions in relation to the US residential electricity market. It focuses on the impact of customers' perceptions of the utility's degree of transparency and on the willingness to engage in proenvironmental behavior related to electricity consumption. The responses of 1257 interviewees from US households to questions related to their electricity (...) suppliers are analyzed through structural equation models (SEMs) using latent variables. Results show that customers' perceptions of an electricity utility's transparency affect their willingness to collaborate in environmental programs, and that the degree of perceived transparency of the utility is related to customers' environmental awareness. (shrink)