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已有研究认为,主权信用评级变动主要受宏观经济因素驱动,政治因素的重要性尚未得到实证支撑。此外,评级机构在评级过程中将政治因素作为定性因素加以考量,无法量化其影响程度。鉴于此,本文以政治稳定性为切入点,探讨了政治因素对主权信用评级变动的影响。本文的实证分析表明,政治稳定性的提高(降低)会导致经济体主权信用评级的提升(下降),其中穆迪和惠誉尤为重视政治稳定性的作用。这一影响具有非公允性:对于与美国的政治和文化关系不友好的经济体、欠发达经济体以及亚太和非洲地区经济体而言,政治稳定性变动对经济体主权信用评级的影响较为显著。这一影响也具有溢出效应:美英政治稳定性的提高会导致其他经济体的主权信用评级被下调,这在发达经济体中较为显著。中国政府应重视政治因素对主权信用评级变动的影响,关注不同评级机构的评级偏好,高度重视评级的公允性问题。
Abstract:(1)详见SEC官网:“SEC Publishes Annual Staff Report on Nationally Recognized Statistical Rating Organizations,” February 2nd, 2023, https://www.sec.gov/news/press-release/2023-21,访问时间:2024年8月3日。
(2)Alexander W.Butler and Larry Fauver,“Institutional Environment and Sovereign Credit Ratings,” Financial Management, Vol.34, No.3, 2006, pp.53-79;Hüseyin?ztürk,“The Origin of Bias in Sovereign Credit Ratings:Reconciling Agency views with Institutional Quality,” The Journal of Development Areas, Vol.48, No.4,2014, pp.161-188;Orhan Erdem and Yusuf Varli,“Understanding the Sovereign Credit Ratings of Emerging Markets,” Emerging Markets Review, Vol.20, No.9, 2014,pp.42-57;Periklis Boumparis, Costas Milas and Theodore Panagiotidis,“Economic Policy Uncertainty and Sovereign Credit Rating Decisions:Panel Quantile Evidence for the Eurozone,”Journal of International Money and Finance, Vol.79, No.12, 2017, pp.39-71.
(3)例如,2023年8月1日惠誉下调美国主权信用评级的原因之一就是美国的政府治理不断恶化。又如,英国脱欧导致标普在2016年将英国的主权信用评级从AAA下调至AA,且维持至今。
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(2)Butler and Fauver,“Institutional Environment and Sovereign Credit Ratings,”pp.53-79;?ztürk,“The Origin of Bias in Sovereign Credit Ratings:Reconciling Agency views with Institutional Quality,” pp.161-188;Erdem and Varli,“Understanding the Sovereign Credit Ratings of Emerging Markets,” pp.42-57.
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(4)苏民:《中国主权信用评级被低估了吗?:基于面板线性与有序概率回归方法》,载《世界经济研究》,2017年第11期,第121—134+137页。
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(4)Butler and Fauver,“Institutional Environment and Sovereign Credit Ratings,”pp.53-79;Ozturk,“The Origin of Bias in Sovereign Credit Ratings:Reconciling Agency views with Institutional Quality,” pp.161-188;Erdem and Varli,“Understanding the Sovereign Credit Ratings of Emerging Markets,” pp.42-57;Boumparis, Milas and Panagiotidis,“Economic Policy Uncertainty and Sovereign Credit Rating Decisions:Panel Quantile Evidence for the Eurozone,” pp.39-71.
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(3)Ozturk,“The Origin of Bias in Sovereign Credit Ratings:Reconciling Agency views with Institutional Quality,” pp.161-188.
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(1)杨攻研、刘洪钟:《政治关系、经济权力与贸易往来:来自东亚的证据》,载《世界经济与政治》,2015年第12期,第110—130页;杨连星、刘晓光、张杰:《双边政治关系如何影响对外直接投资——基于二元边际和投资成败视角》,载《中国工业经济》,2016年第11期,第56—72页。(2)“母国”指机构总部所在的经济体。如果评级机构在其他条件相同的情况下,对其母国或与其存在密切经济、政治和文化联系的经济体给予较高评级,我们将其称为主权信用评级中的“母国偏见”。
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(1)Afonso, Gomes and Rother,“What‘hides’ Behind Sovereign Debt Ratings?”pp.1-62;Gültekin-Karaka?, Hisarc?kl?lar and?ztürk,“Sovereign Risk Ratings:Biased toward Developed Countries?” pp.69-87;Afonso, Gomes and Rother,“Short-and Longrun Determinants of Sovereign Debt Credit Ratings,” pp.1-15;那明:《金融危机背景下国家主权信用评级影响因素分析——基于27个OECD国家面板数据的研究》,第28—33+88页。
(1)Peter Reusens and Christophe Croux,“Sovereign Credit Rating Determinants:A Comparison Before and After the European Debt Crisis,” Journal of Banking&Finance, Vol.77, No.4, 2017, pp.108-121;De Moor, Luitel and Sercu, et al.,“Subjectivity in Sovereign Credit Ratings,” pp.366-392.
(2)短期发行人信用评级关注的是债务人在短期内履行其所有财务承诺的能力和意愿,标普可以分为A-1+、A-1、A-2、A-3、B、C以及SD和D共7个级别;穆迪有P-1、P-2、P-3以及NP共4个级别;而惠誉有F1+、F1、F2、F3、B、C、RD以及D共8个级别。
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(1)我们使用方差膨胀因子(VIF)法和相关系数法检验了核心解释变量与各控制变量之间的相关性,结果表明二者之间不存在严重的多重共线性问题。
(1)参见标普(www.standardandpoors.com)、穆迪(www.moodys.com)、惠誉(www.fitchratings.com)。
(2)参见世界银行(http://data.worldbank.org)。
(1)需要说明的是,由于不同的评级机构对不同经济体开始评级的时间不一致,并不是所有经济体在1996—2022年均有数据(如穆迪对乌克兰于1998年2月6日开始评级),因此本文经济体评级机构层面的数据并不完全覆盖1996—2022年(其中,剔除1997年、1999年和2001年的数据)。
(1)本文根据经济体的实际有效汇率指数计算其实际有效汇率波动。具体而言,对月度实际有效汇率指数取差分,并计算其年度的标准差,得到实际有效汇率波动。
(1)Peter Reusens and Christophe Croux,“Sovereign Credit Rating Determinants:A Comparison before and after the European Debt Crisis,” Journal of Banking&Finance, Vol.77, No.4, 2017, pp.108-121.
基本信息:
DOI:10.16513/j.cnki.qjip.20260713.001
中图分类号:F113;D50
引用信息:
[1]王瑶,张明.政治稳定性对主权信用评级变动的影响[J].国际政治科学,2026(02):206-243.DOI:10.16513/j.cnki.qjip.20260713.001.
2026-07-13
2026-07-13
2026-07-13