# The Economic Case for Corporate Carbon-Accounting Disclosure

The argument for mandatory corporate carbon-accounting disclosure rests on a well-established economic foundation: the correction of market failures arising from information asymmetry and negative externalities. When firms are not required to account for their greenhouse gas emissions, the true costs of carbon-intensive activities remain hidden from investors, consumers, and regulators alike, producing systematic misallocation of capital and distorted price signals throughout the economy.

**Addressing Information Asymmetry**

Financial markets function efficiently only when material risks are visible to participants. Carbon exposure represents a genuine financial risk — through future regulatory liability, stranded asset potential, and reputational vulnerability — yet without standardised disclosure, investors cannot accurately price these risks into valuations. The result is a form of adverse selection, where capital flows toward apparently profitable but environmentally costly enterprises whose liabilities remain concealed. Mandatory disclosure corrects this by enabling investors to make genuinely informed decisions, improving capital allocation efficiency across the economy as a whole.

**Internalising Externalities**

Carbon emissions are a textbook negative externality: the social costs of climate change are borne by parties outside the transaction rather than by the emitting firm. Disclosure alone does not eliminate this externality, but it creates the informational precondition for pricing mechanisms — carbon taxes or cap-and-trade systems — to function effectively. Without reliable emissions data, regulators cannot calibrate instruments accurately, and markets cannot form around carbon credits with any credibility. Disclosure therefore acts as essential infrastructure for broader market-based climate solutions.

**Competitive Dynamics and Innovation**

Transparent carbon accounting also generates competitive incentives for emissions reduction. When firms must publicly report their carbon footprint, high-emission operations become a source of commercial disadvantage, attracting investor scrutiny and consumer pressure simultaneously. This dynamic encourages investment in cleaner technologies and operational efficiencies that might otherwise be deferred. The aggregate effect is to accelerate decarbonisation through market competition rather than purely through regulatory mandate, which is generally a more economically efficient mechanism.

**Challenges and Counterarguments**

The economic case is not without complications. Compliance costs, particularly for smaller firms, can be substantial, and the risk of inconsistent methodologies undermining comparability is real. Critics also point to the danger of "disclosure theatre," where firms satisfy reporting requirements without substantive behavioural change. These concerns argue for well-designed, standardised frameworks — such as those advanced by the ISSB or the SEC's climate disclosure rules — rather than against disclosure itself.

**Conclusion**

Ultimately, corporate carbon-accounting disclosure addresses a fundamental market failure by making previously invisible costs legible to economic actors. It is not a sufficient condition for decarbonisation, but it is arguably a necessary one. The economic logic is straightforward: markets cannot efficiently price what they cannot measure, and they cannot measure what firms are not required to report.