サステナビリティ保証の選択的採用：観察可能な行動に対する開示と公共政策への含意
Selective Adoption of Sustainability Assurance: Disclosure Relative to Observable Conduct and Public Policy Implications (原題)
Manirul Islam
🤖 gxceed AI 要約
日本語
S&P500の430社・2010〜2024年のパネルを用い、サステナビリティ保証の採用が開示水準とどう関係するかを検証。保証を受けた企業年はESG論争を条件付けても開示が約0.3標準偏差高いが、これは因果効果ではなく、開示水準の高い企業が翌年に保証を初採用する選択的採用パターンだと示す。二つの商用保証データの一致率は85.4%にとどまり、二値の保証フィールドでは規制上の扱いを精度高く識別できないと政策面で警告する。
English
Using a 430-firm S&P 500 panel (2010–2024), the study estimates sustainability disclosure directly as a function of assurance and observable conduct. Assured firm-years show ~0.3 SD more disclosure conditional on ESG controversies, but higher pre-assurance disclosure predicts first adoption—evidence of selective adoption, not a causal assurance effect. Two commercial assurance extracts agree on only 85.4% of firm-years, so binary assurance fields cannot identify regulatory treatment with engagement-level precision.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
SSBJ基準の適用と有報・統合報告書での保証拡大を議論する日本にとって、保証導入の順序と測定限界は直接参考になる。保証範囲・水準・対象・実務者・対象期間の情報整備が規制評価の前提となる点は、日本での保証制度設計に示唆を与える。
In the global GX context
As CSRD and ISSB push assurance into mandatory disclosure infrastructure, this paper shows binary assurance flags are too coarse for regulatory evaluation and that adoption is endogenous to disclosure maturity. It argues evaluation needs engagement-level detail—scope, level, subject matter, practitioner, covered period—directly relevant to global assurance-standard debates.
👥 読者別の含意
🔬研究者:保証と開示の内生性を扱う際、生成残差に依存しない設計と複数データソースの競合処理が参考になる。
🏢実務担当者:保証導入の判断は開示成熟度に依存し、二値フラグではなく保証範囲・水準の情報開示が投資家評価に効く。
🏛政策担当者:保証を規制インフラとするなら、二値フィールドでは不十分で、エンゲージメント単位の情報収集が評価に不可欠。
📄 Abstract（原文）
External assurance is becoming part of the regulatory infrastructure for sustainability reporting, but voluntary adoption may occur only after reporting systems have matured. This study examines that selection pattern in a balanced panel of 430 firms from the S&P 500 universe from 2010 to 2024. The design estimates sustainability disclosure directly as a function of assurance and observable conduct, avoiding a generated residual dependent variable. To guard against single-source measurement error, two commercial assurance extracts that agree on only 85.4% of jointly observed firm-years are treated as competing measures rather than a gold standard, and the principal results are required to hold across both. Assured firm-years exhibit 0.313 standard deviations more disclosure conditional on ESG controversies in the higher-coverage extract (t = 8.59) and 0.287 in the lower-coverage extract (t = 6.97). The association survives alternative ESG-performance benchmarks, a controversy-ceiling restriction, and a physical Scope 1 and Scope 2 carbon-intensity benchmark. Discrete-time models show that higher disclosure, measured while firms are still unassured, predicts first assurance adoption in the following year in both extracts. The evidence identifies selective adoption, not a causal assurance effect. For public policy, it shows that binary assurance fields do not identify the regulatory treatment with engagement-level precision and that evaluation requires information on scope, level, subject matter, practitioner and covered period, identifying the reporting position from which firms first enter assurance.
🔗 Provenance — このレコードを発見したソース
- openaire https://doi.org/10.2139/ssrn.7356168first seen 2026-11-05 04:44:15
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