Financial incentives are increasingly recognized as powerful tools for encouraging behavior change across diverse domains, including public health, environmental conservation, and social welfare. Their application within the One Health framework—where the interconnectedness of human health, animal health, and ecosystem integrity is pivotal—presents new and complex challenges. A recent comprehensive review published in Science in One Health rigorously examines over twenty years of research on financial incentives, revealing nuanced insights into their potential and limitations in this intertwined context.
The evidence supporting the efficacy of conditional financial incentives in promoting desirable health behaviors is robust, particularly in the short-term. Meta-analyses and systematic reviews indicate these programs achieve meaningful behavior change up to 18 months post-intervention. Nonetheless, the durability of these changes over longer periods remains poorly characterized, signaling a crucial knowledge gap. Similarly, payment for ecosystem services—a financial mechanism aimed at fostering sustainable environmental stewardship—has yielded several successful case studies globally. However, the benefits are generally modest and heavily contingent upon factors such as governance quality, security of property rights, and the rigor of compliance monitoring.
Despite this promise, multiple substantive challenges compromise the effectiveness of financial incentives in One Health initiatives. One primary concern is ensuring additionality, which requires confirmation that incentives drive new behaviors rather than merely compensating existing practices. Additionally, monitoring compliance proves particularly difficult when behaviors are complex, recurrent, or collective. Simple actions, such as disease case reporting, lend themselves more readily to incentive-based intervention due to ease of verification. Another critical issue involves distinguishing individual-level behaviors, which are comparatively straightforward to incentivize, from collective behaviors that demand coordinated action and shared accountability, making the design and implementation of group incentives considerably intricate.
Equity considerations constitute another significant barrier. Incentive programs often inadvertently privilege influential community members or disrupt existing livelihoods without offering viable alternatives, raising ethical concerns. Further complicating matters is the problem of moral hazard, where poorly structured payments unintentionally promote undesirable or even harmful behaviors. For instance, rewards linked solely to output quantity can lead to overexploitation of natural resources or the overbreeding of animals. Income effects also warrant close scrutiny, especially in low-income settings where incentives represent substantial income portions. If beneficiaries anticipate the cessation of payments following successful outcomes, this unpredictability may paradoxically motivate covert support for continued disease transmission or environmental degradation.
A number of pivotal questions remain unanswered across the literature on financial incentives in One Health. The interplay between financial incentives and communication strategies remains obscure, despite evidence suggesting integrated messaging campaigns can amplify uptake. The phenomenon of motivation crowding—where extrinsic rewards potentially undermine intrinsic motivation—is variably reported and poorly understood, complicating prediction of program outcomes. Additionally, the comparative advantages of cash versus non-cash incentives continue to be debated; non-monetary rewards may often bypass motivation crowding issues but their scalability and cultural acceptance vary widely.
Conditionality—or the requirement that behavior verification precedes payment—represents another area of active debate. While conditional incentives align payments with desired actions, their administrative burden can be substantial. Perhaps most critically, the long-term impacts of incentives following program termination remain uncertain: behaviors may persist through habituation and internalized social norms or fade as motivations dissipate. Designing effective collective incentives is an evolving field; in some instances, group-based payments have enhanced community governance structures, while in others, they have exacerbated conflict and mistrust.
The global effort to eradicate Guinea worm disease exemplifies both the promise and intricacies of financial incentives within a One Health paradigm. Once a scourge afflicting millions annually, Guinea worm cases in humans have plummeted by 99.9% since eradication efforts began in 1986. However, the rise of infections among domestic dogs and other animals—first observed in Chad in 2012 and now prevalent across several African nations—complicates this trajectory. Intrinsically linked to human health, animal reservoirs pose new obstacles that demand innovative, integrative strategies.
Guinea Worm Eradication Programs (GWEPs) have implemented three principal financial incentive models tailored to this context. Firstly, direct cash rewards for reporting human cases have proved effective. Reporting constitutes an individual, easily verifiable action with clear public health benefits, attributes conducive to robust incentivization. Notably, reward amounts have escalated considerably, now often equating to several months’ income for recipients—highlighting the high stakes of total eradication.
In contrast, incentives aimed at reporting infected animals, particularly dogs, have generated complex outcomes. Initially, Chad’s per-animal rewards inadvertently motivated some households to increase dog ownership in hopes of capitalizing financially, triggering rises in stray dog numbers and disputes over reward eligibility. In response, program adjustments shifted rewards to a household-level basis and integrated community awareness campaigns, mitigating perverse incentives while sustaining reporting motivation.
Dog tethering incentives, designed to restrict animal movement and reduce contamination of water sources, illustrate further challenges. While tethering behavior is observable locally, external verification necessitates sustained surveillance resources. In empowering communities to allocate and manage rewards—some opting to pool incentive funds for collective public goods—GWEP demonstrates the potential for locally-adapted governance models. Monthly payments around US$5 per qualifying household reflect a deliberate balance: sufficient to encourage compliance without fostering dependency.
Synthesizing lessons from Guinea worm eradication alongside broader research yields critical design principles for implementing financial incentives in One Health applications. Behavioral targets must be observable and not already commodified by competing market incentives. Rewards should be calibrated to motivate but avoid becoming reliable income streams. Integrative communication and community engagement are essential to foster shared understanding and commitment. Rather than imposing top-down mandates, local empowerment enhances legitimacy and adaptability. Crucially, anticipating and mitigating unintended consequences via rigorous monitoring and iterative program refinement are indispensable for success.
In sum, while financial incentives have considerable potential to foster behavior change at the nexus of human, animal, and ecosystem health, their application must be pursued with nuanced caution. Empirical synthesis cautions that incentives often yield modest effects, strongly mediated by contextual determinants, and their enduring impact after program cessation remains largely unknown. When evidence-based design and monitoring capacities are insufficient to address challenges such as additionality, collective action requirements, equity, and moral hazards, alternative approaches emphasizing social engagement, education, and sustainable infrastructure investment may prove preferable.
Achieving success within the One Health framework demands integrated, context-sensitive strategies, robust surveillance systems, flexible management, and genuine community partnerships. Where financial incentives are judiciously embedded within well-designed, mutually reinforcing programs—grounded in social science insights and attuned to local values—they can meaningfully contribute to advancing the health of people, animals, and the environments upon which all depend.
Subject of Research: Financial incentives for behavior change at the intersection of human, animal, and ecosystem health in One Health contexts.
Article Title: Navigating the challenges in implementing financial incentives for behavior change at the intersection of human, animal, and ecosystem health: a case study
News Publication Date: 20-Jan-2026
Web References: http://dx.doi.org/10.1016/j.soh.2025.100144
Image Credits: John M. Kerr, Maryann G. Delea, Minwoong Chung, Jinhua Zhao, Jesse Crawford, Maria Knight Lapinski
Keywords: One Health, financial incentives, behavior change, Guinea worm eradication, disease reporting, ecosystem services, collective action, moral hazard, motivation crowding, community engagement
