01 / The problem
Innovation stalls when the downside is unbounded
Without guaranteed demand, an R&D firm faces a wide distribution of outcomes that includes deep losses.
Firm payoff distribution: before and after AMC
Probability curves for R&D project payoff under two scenarios.
The AMC truncates the left tail of firm outcomes. When guaranteed demand eliminates the prospect of zero-return R&D investment, the innovation deadlock between public need and private risk resolves.
02 / The shift
AMC raises adoption at every cost level
Adoption frontier with and without AMC
At any given farmer net cost, adoption sits higher under the AMC. The mechanism's effective subsidy raises farmers' tolerance for input cost.
At $95 per animal-year, the AMC raises adoption from roughly 50% to 75%. The mechanism does not change the technology; it changes who can afford to adopt it.
03 / The geography
Readiness is uneven, but the opportunity is global
Global adoption readiness index
0 to 100 composite score · four equally-weighted factors · illustrative ranking
Brazil and India lead on two independent axes: herd scale and policy alignment. The eight countries mapped here represent approximately 65% of global enteric methane emissions from cattle and dairy.
▶ How this was scored
Each country is scored 0 to 100 on four equally-weighted structural factors, then averaged into a composite readiness index. The index is illustrative: it captures structural preconditions for vaccine adoption, not a formal audit or official ranking.
| Country | Herd scale | Infrastructure | Farm incentive | Policy alignment | Index |
|---|---|---|---|---|---|
| Brazil | 100 | 85 | 90 | 100 | 96 |
| India | 100 | 70 | 80 | 100 | 88 |
| Australia | 65 | 100 | 80 | 65 | 78 |
| USA | 70 | 95 | 60 | 55 | 72 |
| Argentina | 65 | 65 | 55 | 55 | 60 |
| China | 75 | 60 | 40 | 45 | 55 |
| Mexico | 45 | 50 | 45 | 45 | 46 |
| Ethiopia | 55 | 20 | 35 | 40 | 38 |
Herd scale: national cattle & dairy herd size relative to global top; proxy for total abatement opportunity.
Infrastructure: cold-chain capacity, veterinary service density, and rural logistics quality needed for vaccine delivery.
Farm incentive: existing subsidy structures, input cost sensitivity, and farmer income margins that shape willingness to adopt a new input cost.
Policy alignment: NDC livestock coverage, national agriculture climate commitments, and regulatory openness to novel veterinary products.
Sources: FAO FAOSTAT Livestock Primary (2022) · World Bank Logistics Performance Index (2023) · UNFCCC NDC Registry (2025) · Spark Climate Solutions Enteric Methane Roadmap (2025) · Scores authored by the project team based on published indicators; not an official index.
04 / The returns
Funding scales sub-linearly
Funding vs. cumulative abatement
Early returns accelerate as fixed costs amortize across more abatement. Beyond roughly $750M, marginal abatement falls as the highest-readiness adoption is captured first.
At the $534M baseline, the abatement curve has not yet flattened. The designed commitment sits in the high-return portion of the curve, before diminishing marginal returns set in.
05 / The payoff
Cumulative avoided emissions diverge rapidly
Cumulative emissions reduction: with and without AMC
The without-AMC baseline assumes some organic adoption from voluntary actors. The gap between the two curves represents AMC-attributable abatement.
The 142 MtCO₂e gap by 2035 is the mechanism's attributable impact. The without-AMC baseline is not zero: organic adoption from voluntary actors continues. The mechanism accelerates what the market would otherwise deliver too slowly to matter.
06 / The efficiency
Abatement cost falls sharply and stays low
Cost per tonne CO₂e avoided vs. adoption rate
Baseline scenario · GWP100 · 10-year program horizon · fixed costs $120M, variable costs scale with adoption
Cost per tonne falls as fixed program costs amortize across a growing abatement base. At baseline adoption (25%), the mechanism delivers abatement at roughly 1.7% of the EPA's estimated social cost of the harm it prevents.