On spillovers in economic evaluations: definition, mapping review and research agenda

María J. Mendoza-Jiménez (), Job Exel and Werner Brouwer
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María J. Mendoza-Jiménez: Erasmus University Rotterdam
Job Exel: Erasmus University Rotterdam

The European Journal of Health Economics, 2024, vol. 25, issue 7, No 10, 1239-1260

Abstract: Abstract An important issue in economic evaluations is determining whether all relevant impacts are considered, given the perspective chosen for the analysis. Acknowledging that patients are not isolated individuals has important implications in this context. Increasingly, the term “spillovers” is used to label consequences of health interventions on others. However, a clear definition of spillovers is lacking, and as a result, the scope of the concept remains unclear. In this study, we aim to clarify the concept of spillovers by proposing a definition applicable in health economic evaluations. To illustrate the implications of this definition, we highlight the diversity of potential spillovers through an expanded impact inventory and conduct a mapping review that outlines the evidence base for the different types of spillovers. In the context of economic evaluations of health interventions, we define spillovers as all impacts from an intervention on all parties or entities other than the users of the intervention under evaluation. This definition encompasses a broader range of potential costs and effects, beyond informal caregivers and family members. The expanded impact inventory enables a systematic approach to identifying broader impacts of health interventions. The mapping review shows that the relevance of different types of spillovers is context-specific. Some spillovers are regularly included in economic evaluations, although not always recognised as such, while others are not. A consistent use of the term “spillovers”, improved measurement of these costs and effects, and increased transparency in reporting them are still necessary. To that end, we propose a research agenda.

Keywords: Spillovers; Spillover effects; Spillover costs; Economic evaluation; Definition (search for similar items in EconPapers)
JEL-codes: D60 D61 D62 I00 (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s10198-023-01658-8

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