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| | Abstract | | The failure of consumers to make seemingly cost-effective investments in energy efficiency is commonly referred to as the energy efficiency gap. We review the most recent literature relevant to the energy efficiency gap and in particular discuss what the latest insights from behavioral economics might mean for the gap. We find that engineering studies may overestimate the size of the gap by failing to account for all costs and neglecting particular types of economic behavior. Nonetheless, empirical evidence suggests that market failures such as asymmetric information and agency problems affect efficiency decisions and contribute to the gap. Behavioral anomalies have been shown to affect economic decisionmaking in a variety of other contexts and are being increasingly cited as an explanation for the gap. The relative contributions of the various explanations for the gap differ across energy users and energy uses. This heterogeneity poses challenges for policymakers, but also could help elucidate when different policy interventions will most likely be cost-effective. If behavioral anomalies can be more cleanly linked to energy efficiency investments, then policymakers will face new challenges in performing welfare analysis of energy efficiency policies. |
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