Impact of Subsidy Modes on Herders’ Grassland Carbon Sink Investment Strategies: Resource Allocation Theory

Why It Matters

The findings expose a policy trade‑off between ecological goals and farmer welfare, guiding governments on designing subsidies that balance carbon sequestration with market efficiency.

Key Takeaways

• Carbon subsidies boost carbon sink investment, grazing subsidies deter it.
• Grazing subsidies raise consumer surplus; carbon subsidies lower it.
• Both subsidies increase herders' income across scenarios.
• Effectiveness hinges on per‑unit carbon revenue levels.
• Resource allocation models reveal substitution between grazing and carbon functions.

Pulse Analysis

Grasslands sit at the intersection of agriculture and climate mitigation, providing both grazing pastures and natural carbon sinks. As nations tighten emissions targets, policymakers have turned to subsidies to steer land‑use decisions toward higher carbon sequestration. Yet, the economic incentives for herders—who must allocate limited resources between livestock production and ecosystem services—remain poorly understood. By framing this dilemma through resource‑allocation theory, the study offers a rigorous lens to predict how financial incentives reshape land‑use patterns, complementing existing empirical work on ecosystem service payments.

The authors construct three optimisation scenarios: a baseline with no subsidies, a carbon‑sink revenue subsidy that directly rewards sequestered carbon, and a grazing‑product subsidy that lowers the cost of livestock outputs. Simulations reveal a clear divergence: carbon‑sink subsidies successfully shift investment toward sequestration but erode consumer surplus, while grazing subsidies increase surplus but discourage carbon‑sink development. Importantly, both mechanisms raise herders’ overall income, suggesting that financial support can be politically palatable. The magnitude of these effects hinges on the per‑unit price assigned to carbon, underscoring the need for accurate carbon valuation in subsidy design.

For U.S. policymakers, the research underscores that one‑size‑fits‑all subsidies risk unintended consequences. Designing a mixed‑instrument approach—perhaps pairing modest carbon payments with targeted support for sustainable grazing—could reconcile ecological objectives with market efficiency. Moreover, the study’s multi‑agent simulation framework offers a scalable tool for testing regional subsidy schemes before rollout, helping to avoid costly policy missteps while advancing national climate and agricultural goals.