低炭素都市パイロット政策と企業のグリーンイノベーション：中国A株上場企業に基づく準自然実験
Low-Carbon City Pilot Policy and Corporate Green Innovation: A Quasi-Natural Experiment Based on Chinese A-Share Listed Companies (原題)
Shiyu Wang
🤖 gxceed AI 要約
日本語
中国の低炭素都市パイロット（2010・2012・2017年）を準自然実験とし、2008〜2023年のA株上場企業4957社のパネルデータと段階的DIDでグリーン発明特許出願への効果を検証。パイロット都市企業の出願は平均約5.6%増加し、弱いポーター仮説の「強制」メカニズムを支持。ただし効果は資金制約の低い企業に限定され、資源制約企業では有意でなく、ポーター仮説の「条件付き妥当性」を示す。
English
Using China's low-carbon city pilots (2010/2012/2017) as a quasi-natural experiment and staggered DID on 4,957 A-share listed firms (2008–2023), the study finds the policy raises green invention patent applications by about 5.6% on average, supporting the weak Porter hypothesis. However, benefits accrue mainly to firms with lower financing constraints, revealing a conditional validity and an innovation-offset threshold.
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
中国の環境規制と企業イノベーションの実証は、日本でもカーボンプライシングやSSBJ開示に伴う規制の「強制効果」を議論する際の参照点となる。特に資金制約が効果を左右する点は、中小企業支援や移行金融設計を考える日本企業・政策当局にとって示唆的。
In the global GX context
This paper adds micro-level evidence to the Porter hypothesis debate, relevant to global discussions on how carbon pricing and disclosure mandates (TCFD/ISSB/CSRD) affect corporate innovation. The finding that financing constraints moderate policy effects informs transition finance and differentiated regulation design worldwide.
👥 読者別の含意
🔬研究者:環境規制とイノベーションの因果推論に関心のある研究者にとって、段階的DIDと資金制約の閾値分析の応用例。
🏢実務担当者:規制強化が自社のグリーン投資・特許戦略に与える影響を、資金制約の観点から評価する材料。
🏛政策担当者:低炭素政策の効果が企業の資金制約に左右されるため、中小企業向けの金融支援や差別化政策の必要性を示唆。
📄 Abstract（原文）
Whether environmental regulation “forces” or “crowds out” corporate green innovation is both the core proposition of the four-decade Porter hypothesis debate and a practical concern for policy design under China’s “dual-carbon” goals. Taking the low-carbon city pilots established in three waves in 2010, 2012, and 2017 as a quasi-natural experiment, this paper uses panel data of 4957 Chinese A-share listed companies over 2008–2023 and a staggered difference-in-differences (DID) model to systematically examine the effect of the pilot policy on corporate green invention patent applications. The findings are as follows. (1) The low-carbon city pilot significantly promotes corporate green invention patent applications, raising them by about 5.6% on average for firms in pilot cities, which supports the “forcing” mechanism of the weak Porter hypothesis. (2) Financing constraints are the key threshold determining whether firms benefit: the policy effect is significantly positive for firms with lower financing constraints, whereas resource-constrained firms obtain no significant improvement. This study provides direct micro-level evidence for the “conditional validity” of the Porter hypothesis in the Chinese context: the policy produces a “forcing” effect on average, but the distribution of its benefits is moderated by firm resource endowments, and an innovation-offset threshold exists—firms that cross it benefit, while those that do not show no significant effect. The paper provides new evidence from Chinese firms on the relationship between environmental regulation and corporate green innovation and offers implications for differentiated environmental policy design.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.53941/eem.2026.100016first seen 2026-10-16 04:56:57
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