Article(id=1170683278664188616, tenantId=1146029695717560320, journalId=1146120045056339983, issueId=1170683276562833831, articleNumber=1002-980X(2025)07-0120-15, orderNo=null, doi=10.12404/j.issn.1002-980X.J24083002, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1723996800000, receivedDateStr=2024-08-19, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1757042243876, onlineDateStr=2025-09-05, pubDate=1753372800000, pubDateStr=2025-07-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1757042243876, onlineIssueDateStr=2025-09-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1757042243876, creator=13701087609, updateTime=1757042243876, updator=13701087609, issue=Issue{id=1170683276562833831, tenantId=1146029695717560320, journalId=1146120045056339983, year='2025', volume='44', issue='7', pageStart='1', pageEnd='134', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1757042243374, creator=13701087609, updateTime=1757066615189, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1170785499422703675, tenantId=1146029695717560320, journalId=1146120045056339983, issueId=1170683276562833831, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1170785499422703676, tenantId=1146029695717560320, journalId=1146120045056339983, issueId=1170683276562833831, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=120, endPage=134, ext={EN=ArticleExt(id=1170683279389803216, articleId=1170683278664188616, tenantId=1146029695717560320, journalId=1146120045056339983, language=EN, title=Does Low-Carbon City Pilot Policy Promote the Development of Renewables? Evidence from Renewable Energy Enterprises, columnId=1149284495636906656, journalTitle=Journal of Technology Economics, columnName=Technology Economics Evaluation, runingTitle=null, highlight=null, articleAbstract=
The low-carbon city pilot policy not only impacts the urban energy consumption and carbon emissions at the macro level, but also influences the digital transformation, energy conservation, and total factor productivity of industrial, manufacturing, and heavy-pollution enterprises at the micro level. However, how it affects the development of renewables remains unknown. Against this backdrop, a “quasi-natural experiment” was developed from the low-carbon city polit, and the difference-in-difference (DID) model was used to examine its impacts on the performance of renewable energy enterprises. The findings indicate that the low-carbon city polit policy notably promotes the development of renewables by enhancing the performance of renewable energy enterprises in the polit areas, and this promoting effect is strengthened as the policy progresses. The results remain robust after a series of rigorous tests. The policy primarily boosts corporate performance by increasing the net profit of renewable energy enterprises. Additionally, heterogeneities across enterprise regions, ownership types, and business categories are observed: the promotion effects are more significantly occurred in central and western China, state-owned renewable energy enterprises, and renewable power generation enterprises. These results contribute to a deeper understanding of how the development of renewables and energy transition can be achieved through the low-carbon city pilot policy.
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低碳城市试点政策不仅会在宏观层面影响城市的能源消耗与碳排放,而且会在微观层面影响工业、制造业、重污染等企业的数字化转型、节能减排及全要素生产率等方面,但该政策如何影响再生能源企业的发展仍未知。基于此,本文将低碳城市试点政策视作一项“准自然实验”,运用双重差分模型检验该政策对再生能源企业的绩效影响。研究发现,低碳城市试点政策通过促进试点地区再生能源企业绩效提升从而促进可再生能源产业发展,随着政策推进,促进作用逐渐增强。经一系列稳健性检验后该结果依然成立。该政策主要通过促进再生能源企业净利润来提升其企业绩效;同时政策效果存在着企业所属区域、企业性质、企业类型方面的异质性:该政策对我国中西部的再生能源企业、国有再生能源企业及再生能源发电企业绩效的促进作用更为明显。研究成果为进一步推广低碳城市试点政策中有针对性地推进再生能源产业发展以助力能源结构转型提供了借鉴和参考。
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郑佳佳(1984—),博士,河南大学商学院副教授,博士研究生导师,研究方向:资源、环境经济和可持续发展;
赵若琳(1999—),河南大学商学院硕士研究生,研究方向:技术经济与管理。
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郑佳佳(1984—),博士,河南大学商学院副教授,博士研究生导师,研究方向:资源、环境经济和可持续发展;
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郑佳佳(1984—),博士,河南大学商学院副教授,博士研究生导师,研究方向:资源、环境经济和可持续发展;
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赵若琳(1999—),河南大学商学院硕士研究生,研究方向:技术经济与管理。
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赵若琳(1999—),河南大学商学院硕士研究生,研究方向:技术经济与管理。
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2018(3): 62-79., articleTitle=开发区设立与地区制造业升级, refAbstract=null)], funds=[Fund(id=1170744027222680463, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, awardId=22BJY133, language=CN, fundingSource=国家社会科学基金一般项目“双碳目标下数字技术驱动新能源产业创新发展的机理及路径研究”(22BJY133), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1170744023955317587, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, xref=null, ext=[AuthorCompanyExt(id=1170744023963706196, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, companyId=1170744023955317587, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Business School, Henan University, Kaifeng 475004, China), AuthorCompanyExt(id=1170744023980483413, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, companyId=1170744023955317587, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=河南大学商学院, 开封 475004)])], figs=[ArticleFig(id=1170744025184248680, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=/GVodjlxDXgCKzBVubMV3g==, figureFileBig=lHOGwHdLR7KGxqxMEEu4IQ==, tableContent=null), ArticleFig(id=1170744025238774633, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=图1, caption=
第二批平行趋势检验, figureFileSmall=/GVodjlxDXgCKzBVubMV3g==, figureFileBig=lHOGwHdLR7KGxqxMEEu4IQ==, tableContent=null), ArticleFig(id=1170744025297494890, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=kVyzZ4AFKgmKyVYox/O4yw==, figureFileBig=K4JMO+qzTdIsWDbHyRkyqg==, tableContent=null), ArticleFig(id=1170744025356215147, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=图2, caption=
第三批平行趋势检验, figureFileSmall=kVyzZ4AFKgmKyVYox/O4yw==, figureFileBig=K4JMO+qzTdIsWDbHyRkyqg==, tableContent=null), ArticleFig(id=1170744025406546796, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=IfKJSg/bnOYMW1LQqwKNCw==, figureFileBig=hJvXEQ/T/AzLyrZja6pZPQ==, tableContent=null), ArticleFig(id=1170744025465267053, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=图3, caption=
第二批安慰剂检验, figureFileSmall=IfKJSg/bnOYMW1LQqwKNCw==, figureFileBig=hJvXEQ/T/AzLyrZja6pZPQ==, tableContent=null), ArticleFig(id=1170744025574318958, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=1um+nzcfl02QqLru7n5Jww==, figureFileBig=pIXU6qIg8CBDwPdMFvvXHA==, tableContent=null), ArticleFig(id=1170744025637233519, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=图4, caption=
第三批安慰剂检验, figureFileSmall=1um+nzcfl02QqLru7n5Jww==, figureFileBig=pIXU6qIg8CBDwPdMFvvXHA==, tableContent=null), ArticleFig(id=1170744025712730992, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量类型 | 变量名称 | 变量符号 | 变量说明 | 样本数 | 均值 | 标准差 | 最小值 | 最大值 |
| 被解释变量 | 总资产收益率 | ROA | 净利润/平均总资产 | 494 | 0.028 | 0.056 | -0.200 | 0.863 |
| 营业利润率 | OPR | 营业利润/营业收入 | 494 | 0.071 | 0.130 | -0.843 | 0.532 |
| 解释变量 | 低碳城市试点政策 | treat×time | DID项,衡量政策实施效果 | — | — | — | — | — |
| 控制变量 | 资产负债率 | LEV | 总负债/总资产 | 494 | 0.497 | 0.220 | 0.052 | 1.556 |
| 企业规模 | SIZE | ln(总资产) | 494 | 22.734 | 1.369 | 20.128 | 26.458 |
| 营业收入 | OI | ln(营业收入) | 494 | 21.854 | 1.326 | 19.620 | 25.621 |
| 独立董事比例 | INDE | 独立董事人数/董事会人数 | 494 | 36.758 | 4.873 | 23.080 | 60.000 |
| 成长性 | OIGR | 总资产增长率 | 494 | 0.130 | 0.294 | -0.443 | 3.758 |
| 企业年龄 | AGE | ln(企业年龄+1) | 494 | 2.778 | 0.352 | 0.693 | 3.466 |
| 流动比率 | CR | 流动资产/流动负债 | 494 | 1.897 | 2.001 | 0.094 | 14.766 |
| 股权集中度 | FIRST | 前十大股东持股比例 | 494 | 58.831 | 16.359 | 21.730 | 100.000 |
| 融资约束 | FC | (流动负债-流动资产)/总资产 | 494 | -0.136 | 0.265 | -1.415 | 1.064 |
| 高管薪酬激励 | COMP | ln(企业前三名高管薪酬之和) | 494 | 14.255 | 0.616 | 12.760 | 16.768 |
| 影响机制变量 | 净利润 | NP | ln(净利润) | 494 | 14.699 | 11.931 | -21.540 | 23.765 |
| 总资产 | TA | ln(总资产) | 494 | 22.735 | 1.368 | 20.128 | 26.458 |
| 总收入 | GI | ln(营业总收入) | 494 | 21.855 | 1.325 | 19.620 | 25.621 |
| 总成本 | TC | ln(营业总成本) | 494 | 21.788 | 1.304 | 19.231 | 25.614 |
), ArticleFig(id=1170744025809199985, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表1, caption=
变量定义及描述性统计
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| 变量类型 | 变量名称 | 变量符号 | 变量说明 | 样本数 | 均值 | 标准差 | 最小值 | 最大值 |
| 被解释变量 | 总资产收益率 | ROA | 净利润/平均总资产 | 494 | 0.028 | 0.056 | -0.200 | 0.863 |
| 营业利润率 | OPR | 营业利润/营业收入 | 494 | 0.071 | 0.130 | -0.843 | 0.532 |
| 解释变量 | 低碳城市试点政策 | treat×time | DID项,衡量政策实施效果 | — | — | — | — | — |
| 控制变量 | 资产负债率 | LEV | 总负债/总资产 | 494 | 0.497 | 0.220 | 0.052 | 1.556 |
| 企业规模 | SIZE | ln(总资产) | 494 | 22.734 | 1.369 | 20.128 | 26.458 |
| 营业收入 | OI | ln(营业收入) | 494 | 21.854 | 1.326 | 19.620 | 25.621 |
| 独立董事比例 | INDE | 独立董事人数/董事会人数 | 494 | 36.758 | 4.873 | 23.080 | 60.000 |
| 成长性 | OIGR | 总资产增长率 | 494 | 0.130 | 0.294 | -0.443 | 3.758 |
| 企业年龄 | AGE | ln(企业年龄+1) | 494 | 2.778 | 0.352 | 0.693 | 3.466 |
| 流动比率 | CR | 流动资产/流动负债 | 494 | 1.897 | 2.001 | 0.094 | 14.766 |
| 股权集中度 | FIRST | 前十大股东持股比例 | 494 | 58.831 | 16.359 | 21.730 | 100.000 |
| 融资约束 | FC | (流动负债-流动资产)/总资产 | 494 | -0.136 | 0.265 | -1.415 | 1.064 |
| 高管薪酬激励 | COMP | ln(企业前三名高管薪酬之和) | 494 | 14.255 | 0.616 | 12.760 | 16.768 |
| 影响机制变量 | 净利润 | NP | ln(净利润) | 494 | 14.699 | 11.931 | -21.540 | 23.765 |
| 总资产 | TA | ln(总资产) | 494 | 22.735 | 1.368 | 20.128 | 26.458 |
| 总收入 | GI | ln(营业总收入) | 494 | 21.855 | 1.325 | 19.620 | 25.621 |
| 总成本 | TC | ln(营业总成本) | 494 | 21.788 | 1.304 | 19.231 | 25.614 |
), ArticleFig(id=1170744025888891762, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 第二批 | 第三批 |
| 样本量 | 均值 | 标准差 | 最小值 | 最大值 | 样本量 | 均值 | 标准差 | 最小值 | 最大值 |
| ROA | 266 | 0.033 | 0.043 | -0.200 | 0.298 | 228 | 0.024 | 0.073 | -0.187 | 0.863 |
| OPR | 266 | 0.085 | 0.134 | -0.843 | 0.532 | 228 | 0.055 | 0.126 | -0.662 | 0.393 |
| NP | 266 | 16.330 | 10.258 | -21.540 | 23.765 | 228 | 12.798 | 13.884 | -21.288 | 22.111 |
| TA | 266 | 22.764 | 1.597 | 20.128 | 26.458 | 228 | 22.703 | 1.102 | 20.705 | 25.350 |
| GI | 266 | 21.923 | 1.522 | 19.620 | 25.621 | 228 | 21.776 | 1.097 | 19.690 | 24.415 |
| TC | 266 | 21.847 | 1.486 | 19.231 | 25.614 | 228 | 21.720 | 1.093 | 19.470 | 24.360 |
), ArticleFig(id=1170744026002137971, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表2, caption=
不同批次低碳试点城市中样本企业的绩效特征统计
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| 变量 | 第二批 | 第三批 |
| 样本量 | 均值 | 标准差 | 最小值 | 最大值 | 样本量 | 均值 | 标准差 | 最小值 | 最大值 |
| ROA | 266 | 0.033 | 0.043 | -0.200 | 0.298 | 228 | 0.024 | 0.073 | -0.187 | 0.863 |
| OPR | 266 | 0.085 | 0.134 | -0.843 | 0.532 | 228 | 0.055 | 0.126 | -0.662 | 0.393 |
| NP | 266 | 16.330 | 10.258 | -21.540 | 23.765 | 228 | 12.798 | 13.884 | -21.288 | 22.111 |
| TA | 266 | 22.764 | 1.597 | 20.128 | 26.458 | 228 | 22.703 | 1.102 | 20.705 | 25.350 |
| GI | 266 | 21.923 | 1.522 | 19.620 | 25.621 | 228 | 21.776 | 1.097 | 19.690 | 24.415 |
| TC | 266 | 21.847 | 1.486 | 19.231 | 25.614 | 228 | 21.720 | 1.093 | 19.470 | 24.360 |
), ArticleFig(id=1170744026086024053, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 第二批 | 第三批 |
| 政策前 | 政策后 | 政策前 | 政策后 |
| 实验组 | 对照组 | 实验组 | 对照组 | 实验组 | 对照组 | 实验组 | 对照组 |
| ROA | 0.023 | 0.036 | 0.043 | 0.026 | 0.020 | 0.029 | 0.021 | 0.012 |
| OPR | 0.053 | 0.082 | 0.120 | 0.072 | 0.026 | 0.078 | 0.057 | 0.046 |
| NP | 11.688 | 2.084 | 23.343 | 2.045 | 2.984 | 2.733 | 6.974 | 1.779 |
| TA | 445.479 | 75.627 | 569.220 | 112.453 | 175.743 | 81.798 | 239.431 | 109.212 |
| GI | 172.827 | 62.645 | 191.122 | 63.091 | 84.133 | 27.953 | 103.407 | 42.209 |
| TC | 154.048 | 60.223 | 164.554 | 61.346 | 81.536 | 25.807 | 96.316 | 40.124 |
), ArticleFig(id=1170744026178298744, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表3, caption=
不同批次低碳城市试点政策实施前后分组样本企业绩效特征统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 第二批 | 第三批 |
| 政策前 | 政策后 | 政策前 | 政策后 |
| 实验组 | 对照组 | 实验组 | 对照组 | 实验组 | 对照组 | 实验组 | 对照组 |
| ROA | 0.023 | 0.036 | 0.043 | 0.026 | 0.020 | 0.029 | 0.021 | 0.012 |
| OPR | 0.053 | 0.082 | 0.120 | 0.072 | 0.026 | 0.078 | 0.057 | 0.046 |
| NP | 11.688 | 2.084 | 23.343 | 2.045 | 2.984 | 2.733 | 6.974 | 1.779 |
| TA | 445.479 | 75.627 | 569.220 | 112.453 | 175.743 | 81.798 | 239.431 | 109.212 |
| GI | 172.827 | 62.645 | 191.122 | 63.091 | 84.133 | 27.953 | 103.407 | 42.209 |
| TC | 154.048 | 60.223 | 164.554 | 61.346 | 81.536 | 25.807 | 96.316 | 40.124 |
), ArticleFig(id=1170744026270573434, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 第二批 | 第二批 | 第三批 | 第三批 |
| ROA | ROA | ROA | ROA |
| (1) | (2) | (3) | (4) |
| time×treat | 0.030**(2.26) | 0.025***(2.87) | 0.028*(1.88) | 0.025***(2.79) |
| LEV | | -0.105***(-3.34) | | -0.138***(-3.01) |
| SIZE | | -0.042***(-2.82) | | -0.028*(-1.96) |
| OI | | 0.048**(2.54) | | 0.037***(2.82) |
| INDE | | -0.001(-1.36) | | -0.001(-1.44) |
| OIGR | | 0.012*(1.74) | | 0.046***(3.16) |
| AGE | | 0.002(0.09) | | 0.012(0.14) |
| CR | | -0.003(-1.09) | | -0.005**(-2.40) |
| FIRST | | 0.001**(2.32) | | 0.001*(1.88) |
| FC | | -0.029(-0.74) | | -0.019(-0.53) |
| COMP | | 0.012(1.23) | | -0.012(-0.79) |
| _cons | 0.023***(5.22) | -0.190(-0.68) | 0.019***(6.87) | 0.054(0.13) |
| 控制变量 | 否 | 是 | 否 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 |
| N | 266 | 266 | 228 | 228 |
| R2 | 0.618 | 0.419 | 0.331 | 0.635 |
| Adj. R2 | 0.52 | 0.30 | 0.17 | 0.52 |
), ArticleFig(id=1170744026354459515, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表4, caption=
基准回归结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 第二批 | 第二批 | 第三批 | 第三批 |
| ROA | ROA | ROA | ROA |
| (1) | (2) | (3) | (4) |
| time×treat | 0.030**(2.26) | 0.025***(2.87) | 0.028*(1.88) | 0.025***(2.79) |
| LEV | | -0.105***(-3.34) | | -0.138***(-3.01) |
| SIZE | | -0.042***(-2.82) | | -0.028*(-1.96) |
| OI | | 0.048**(2.54) | | 0.037***(2.82) |
| INDE | | -0.001(-1.36) | | -0.001(-1.44) |
| OIGR | | 0.012*(1.74) | | 0.046***(3.16) |
| AGE | | 0.002(0.09) | | 0.012(0.14) |
| CR | | -0.003(-1.09) | | -0.005**(-2.40) |
| FIRST | | 0.001**(2.32) | | 0.001*(1.88) |
| FC | | -0.029(-0.74) | | -0.019(-0.53) |
| COMP | | 0.012(1.23) | | -0.012(-0.79) |
| _cons | 0.023***(5.22) | -0.190(-0.68) | 0.019***(6.87) | 0.054(0.13) |
| 控制变量 | 否 | 是 | 否 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 |
| N | 266 | 266 | 228 | 228 |
| R2 | 0.618 | 0.419 | 0.331 | 0.635 |
| Adj. R2 | 0.52 | 0.30 | 0.17 | 0.52 |
), ArticleFig(id=1170744026425762684, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 被解释变量 | ROA | OPR |
| 样本期间/批次 | (1) (2012—2014年) | (2) (2011—2015年) | (3) (2010—2016年) | (4) 第二批 | (5) 第三批 |
| time×treat | 0.003(0.26) | 0.018*(1.91) | 0.025***(2.87) | 0.061**(2.55) | 0.068***(2.74) |
| _cons | -1.803***(-3.65) | -0.715(-1.52) | -0.190(-0.68) | -1.022(-1.46) | 0.193(0.20) |
| 控制变量 | 是 | 是 | 是 | 是 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 | 是 |
| N | 114 | 190 | 266 | 266 | 228 |
| R2 | 0.835 | 0.671 | 0.618 | 0.724 | 0.673 |
| Adj.R2 | 0.70 | 0.54 | 0.52 | 0.65 | 0.57 |
), ArticleFig(id=1170744026497065853, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表5, caption=
时间趋势回归结果及替换被解释变量回归结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 被解释变量 | ROA | OPR |
| 样本期间/批次 | (1) (2012—2014年) | (2) (2011—2015年) | (3) (2010—2016年) | (4) 第二批 | (5) 第三批 |
| time×treat | 0.003(0.26) | 0.018*(1.91) | 0.025***(2.87) | 0.061**(2.55) | 0.068***(2.74) |
| _cons | -1.803***(-3.65) | -0.715(-1.52) | -0.190(-0.68) | -1.022(-1.46) | 0.193(0.20) |
| 控制变量 | 是 | 是 | 是 | 是 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 | 是 |
| N | 114 | 190 | 266 | 266 | 228 |
| R2 | 0.835 | 0.671 | 0.618 | 0.724 | 0.673 |
| Adj.R2 | 0.70 | 0.54 | 0.52 | 0.65 | 0.57 |
), ArticleFig(id=1170744026585146238, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 第二批(2010年—2012年) | 第三批(2014年—2016年) |
| ROA | OPR | ROA | OPR |
| (1) | (2) | (3) | (4) |
| time×treat(2011) | 0.010(0.83) | 0.017(0.67) | | |
| time×treat(2015) | | | -0.004(-0.14) | -0.038(-1.65) |
| _cons | 0.410(1.40) | 0.870(1.08) | 4.268**(2.04) | 0.870(0.71) |
| 控制变量 | 是 | 是 | 是 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 |
| N | 114 | 114 | 114 | 114 |
| R2 | 0.848 | 0.831 | 0.754 | 0.833 |
| Adj.R2 | 0.72 | 0.69 | 0.55 | 0.70 |
), ArticleFig(id=1170744026677420929, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表6, caption=
调整时间窗口回归结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 第二批(2010年—2012年) | 第三批(2014年—2016年) |
| ROA | OPR | ROA | OPR |
| (1) | (2) | (3) | (4) |
| time×treat(2011) | 0.010(0.83) | 0.017(0.67) | | |
| time×treat(2015) | | | -0.004(-0.14) | -0.038(-1.65) |
| _cons | 0.410(1.40) | 0.870(1.08) | 4.268**(2.04) | 0.870(0.71) |
| 控制变量 | 是 | 是 | 是 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 |
| N | 114 | 114 | 114 | 114 |
| R2 | 0.848 | 0.831 | 0.754 | 0.833 |
| Adj.R2 | 0.72 | 0.69 | 0.55 | 0.70 |
), ArticleFig(id=1170744026757112708, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | NP | TA | GI | TC |
| (1) | (2) | (3) | (4) |
| time×treat | 5.576*(2.00) | 0.069(0.66) | 0.047(0.47) | -0.018(-0.18) |
| _cons | 14.485***(15.68) | 22.742***(660.79) | 21.907***(650.90) | 21.853***(652.92) |
| 时间固定效应 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 |
| N | 266 | 266 | 266 | 266 |
| R2 | 0.331 | 0.974 | 0.965 | 0.968 |
| Adj.R2 | 0.19 | 0.97 | 0.96 | 0.96 |
), ArticleFig(id=1170744026845193095, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表7, caption=
机制检验
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| 变量 | NP | TA | GI | TC |
| (1) | (2) | (3) | (4) |
| time×treat | 5.576*(2.00) | 0.069(0.66) | 0.047(0.47) | -0.018(-0.18) |
| _cons | 14.485***(15.68) | 22.742***(660.79) | 21.907***(650.90) | 21.853***(652.92) |
| 时间固定效应 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 |
| N | 266 | 266 | 266 | 266 |
| R2 | 0.331 | 0.974 | 0.965 | 0.968 |
| Adj.R2 | 0.19 | 0.97 | 0.96 | 0.96 |
), ArticleFig(id=1170744026991993737, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | (1)非国有企业 | (2)国有企业 | (3)东部企业 | (4)中西部企业① | (5)发电企业 | (6)制造企业 |
| ROA | OPR | ROA | OPR | ROA | OPR | ROA | OPR | ROA | OPR | ROA | OPR |
| time×treat | 0.053 | 0.012 | 0.051*** | 0.209*** | 0.008 | 0.048 | 0.036** | 0.072* | 0.052*** | 0.247*** | 0.048 | 0.032 |
| (1.15) | (0.39) | (3.87) | (3.43) | (0.48) | (1.01) | (2.40) | (2.01) | (4.98) | (3.26) | (1.34) | (1.10) |
| 控制变量 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 |
| N | 138 | 138 | 90 | 90 | 108 | 108 | 120 | 120 | 60 | 60 | 168 | 168 |
| R2 | 0.495 | 0.691 | 0.705 | 0.674 | 0.632 | 0.632 | 0.680 | 0.754 | 0.649 | 0.693 | 0.476 | 0.669 |
| Adj.R2 | 0.29 | 0.57 | 0.55 | 0.50 | 0.46 | 0.46 | 0.54 | 0.65 | 0.37 | 0.45 | 0.29 | 0.55 |
), ArticleFig(id=1170744027071685515, tenantId=1146029695717560320, journalId=1146120045056339983, articleId=1170683278664188616, language=CN, label=表8, caption=
企业异质性回归结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | (1)非国有企业 | (2)国有企业 | (3)东部企业 | (4)中西部企业① | (5)发电企业 | (6)制造企业 |
| ROA | OPR | ROA | OPR | ROA | OPR | ROA | OPR | ROA | OPR | ROA | OPR |
| time×treat | 0.053 | 0.012 | 0.051*** | 0.209*** | 0.008 | 0.048 | 0.036** | 0.072* | 0.052*** | 0.247*** | 0.048 | 0.032 |
| (1.15) | (0.39) | (3.87) | (3.43) | (0.48) | (1.01) | (2.40) | (2.01) | (4.98) | (3.26) | (1.34) | (1.10) |
| 控制变量 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 |
| 时间固定效应 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 |
| 个体固定效应 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 | 是 |
| N | 138 | 138 | 90 | 90 | 108 | 108 | 120 | 120 | 60 | 60 | 168 | 168 |
| R2 | 0.495 | 0.691 | 0.705 | 0.674 | 0.632 | 0.632 | 0.680 | 0.754 | 0.649 | 0.693 | 0.476 | 0.669 |
| Adj.R2 | 0.29 | 0.57 | 0.55 | 0.50 | 0.46 | 0.46 | 0.54 | 0.65 | 0.37 | 0.45 | 0.29 | 0.55 |
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