Applying the System Asset Pricing Model to Plastics: Measuring the System Welfare Cost of Synthetic Polymer Proliferation

Plastics destroy 6.67 in welfare for every 1 of resin revenue

The observed average welfare loading β̄_W = 6.67 (90% CI: 4.2–10.8) means each dollar of private resin revenue corresponds to $6.67 in uncompensated system-welfare destruction. The operating-point marginal loading is even higher: β_W ≈ 8.94.

• Median annual system welfare cost W = 4.33 trillion vs. private resin revenue Π = 650 billion
• System-adjusted payoff Π^SA = −$3.53 trillion per year
• Based on 100,000 Monte Carlo draws across six welfare-cost channels

Three channels hide 95% of plastic's damage from conventional accounting

Standard environmental accounting prices plastics as a waste-management or marine-litter problem, capturing roughly 5% of total damage. The rest is latent, persistent, or manufactured.

• Health channel: endocrine-disrupting chemicals leach at ppb levels, causing metabolic and reproductive damage that manifests years later
• Persistence channel: carbon-carbon backbones resist degradation for 10²–10⁵ years; no discount rate can rationalize infinite-horizon costs
• Governance channel: the recycling symbol was placed by industry front groups to defeat container-deposit laws; only 9% of plastic ever recycled

Both standard externality frameworks break for plastics

Pigouvian taxation fails because the damage function has no terminal date—a tonne of polyethylene imposes costs for centuries. Coasean bargaining fails because all five assumptions break simultaneously.

• Pigouvian failure: discount-rate sensitivity makes the 'correct' tax indeterminate; a 3% rate makes year-2500 damages worth zero today
• Coasean failure: property rights undefined over ocean commons (Great Pacific Garbage Patch: 1.6M km², 80,000 tonnes); transaction costs infinite for 7.9 billion exposed humans
• Information radically asymmetric: industry knew recycling was nonviable and promoted the symbol to defeat legislation

ρ-free contemporaneous ratio bypasses the discount-rate paralysis

The observed average loading β̄_W = W/Π is computed in the same year, requiring no social discount rate. This is the key innovation for persistent pollutants.

• Private payoff Π = $650B (resin revenue); system welfare cost W = Σ_k=1⁶ δ_k
• Canonical beta β_W = -dW/dΠ ≈ 8.94 at the operating point (κ = 1.34)
• Break-even mitigation rate μ* = $3.7T/year—5.67× resin revenue—to reach welfare neutrality

Health damage alone exceeds $2 per dollar of resin revenue

The health channel δ_health = 1.5T/yr (range 1.0–$3.0T), giving a channel-specific β_W = 2.31. Microplastics found in 100% of placental tissue, 80% of blood, 60% of arterial plaque (4.5× cardiovascular risk).

• Trasande et al. (2024): U.S. EDC health costs 249–250B/yr from plastic-associated chemicals
• Duke (2025): U.S. health costs 436B–1.109T/yr including microplastic-cardiovascular evidence
• Minderoo-Monaco Commission (2023): global health costs >$250B in 2015

Plastics lifecycle emissions consume 3.3% of global GHGs

δ_climate = 225B/yr (range 150–300B) at SCC of 125/tonne CO₂e. Lifecycle emissions 1.8 Gt CO₂e/yr; by 2050, cumulative emissions could consume 10–13% of the remaining 1.5°C carbon budget.

• CIEL (2019): 1.8 Gt CO₂e/yr from extraction, cracking, incineration, and degradation
• Royer et al. (2018): common plastics emit methane and ethylene under sunlight; rates accelerate with fragmentation
• Channel weight λ_climate = 0.039; channel-specific β_W = 0.35

8–15 million tonnes of plastic enter oceans annually

δ_ocean central estimate 500B/yr (range 200B–$1.5T). The Great Pacific Garbage Patch grows at 2.5–4% per year; ghost gear kills 100,000 marine mammals and 1 million seabirds annually.

• Beaumont et al. (2019): marine natural-capital loss 500B–2.5T/yr
• Ghost gear accounts for up to 30% of fish stock decline in some fisheries
• UNEP direct damage: 13–19B/yr; WWF/Dalberg lifecycle marine channel ~$3.1T

Governance failure is a quantified welfare-cost channel

Waste management δ_waste = 100B/yr; environmental justice δ_EJ = 200B/yr; governance failure δ_gov = 150B/yr. The governance channel includes 10M ACC lobbying in 2024 and 220 industry lobbyists at INC-5.

• Waste: municipal collection, landfill tipping, cleanup—only 9% recycled, 1% recycled more than once
• Environmental justice: open burning in Global South, fenceline communities in 'Cancer Alley'
• Governance: recycling myth delayed structural policy by 30+ years; INC-5 collapsed at Busan (Dec 2024)

β̄_W = 6.67; zero chance of welfare neutrality

Across 100,000 Monte Carlo draws, P(β̄_W < 1) = 0.0000%. The 90% CI [4.2, 10.8] lies entirely above 1. No single channel or dataset determines the estimate.

• Median W = 4.33T; median Π = 650B; β̄_W = 6.67
• κ = 1.34 gives operating-point β_W ≈ 8.94
• System-adjusted payoff Π^SA = −$3.53T/yr

Plastics are a molecular-persistence impossibility structure

Persistent carbon-carbon backbones, production lock-in, and low-realized circularity prevent voluntary exchange from internalizing the welfare burden. Only structural interventions—production caps, material bans, mandatory return rates—can close the gap.

• Shared only with PFAS among calibrated domains; standard Pigouvian/Coasean tools provably insufficient
• Break-even mitigation μ* = $3.7T/yr—5.67× resin revenue—is thermodynamically and politically impossible
• Policy implication: upstream production equilibrium, not downstream cleanup or disclosure

Target single-use packaging and textiles to cut welfare ratio by half

Tiers 1 and 2 (packaging and textiles) account for 60% of resin revenue but 75% of welfare cost. A binding production cap on these tiers could reduce aggregate β̄_W by 40–55% while preserving medical and long-life applications.

• Single-use packaging: 40% of Π, welfare multiplier 12.5×; 12-minute use vs. 500–1,000-year persistence
• Textiles: 20% of Π, welfare multiplier 9.8×; each wash releases 700,000–6,000,000 microfibers
• Medical/industrial specialty: 15% of Π, multiplier 2.1×—last target for reduction

Plastics earn an F on the System Welfare Score

β̄_W = 6.67 places plastics between Monoculture Agriculture (8.6) and PFAS (35.2), far above Nuclear Power (0.7) or AMR (2.1). The impossibility class is shared only with PFAS.

• System Welfare (lowest quintile across all calibrated SAPM domains)
• Portfolio implication: pension funds can assess net welfare impact across petrochemical and renewable holdings
• No ESG score currently delivers this system-level assessment

The analysis moves from cleanup cost to production equilibrium

Plastics do not fail because disposal prices are marginally mismeasured. They fail because production remains privately profitable only when a larger system loss is transferred outside the transaction. The operative question is how much production must be removed.

• Downstream cleanup and disclosure programs cannot close a welfare ratio of 6.67
• The recycling symbol is 'the most successful piece of corporate propaganda in industrial history'
• Thermodynamics does not negotiate with recycling targets