Article(id=1153984493259055346, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1153984484975304790, articleNumber=1671-1807(2025)03-0183-07, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1725465600000, receivedDateStr=2024-09-05, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1753060943188, onlineDateStr=2025-07-21, pubDate=1739116800000, pubDateStr=2025-02-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753060943188, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753060943188, creator=13701087609, updateTime=1753060943188, updator=13701087609, issue=Issue{id=1153984484975304790, tenantId=1146029695717560320, journalId=1146123222451335185, year='2025', volume='25', issue='3', pageStart='1', pageEnd='346', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1753060941213, creator=13701087609, updateTime=1753063140421, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1153993709164159831, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1153984484975304790, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1153993709164159832, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1153984484975304790, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=183, endPage=189, ext={EN=ArticleExt(id=1153984494819336482, articleId=1153984493259055346, tenantId=1146029695717560320, journalId=1146123222451335185, language=EN, title=Digital Transformation and Sustainable Green Innovation of Enterprises, columnId=1151877663716159826, journalTitle=Science Technology and Industry, columnName=Enterprise Application, runingTitle=null, highlight=null, articleAbstract=
Drawing upon Chinese A-share listed companies from 2009 to 2021 as research sample, the impact of digital transformation on firms’ sustained green innovation was explored. It is found that digital transformation significantly promotes firms’ sustained green innovation inputs and outputs, and this conclusion still holds after a series of robustness tests. Heterogeneity analyses results indicate that the contribution of digital transformation to firms’ sustained green innovation varies according to the nature of firms’ property rights and the type of industry. The role of information asymmetry, and investor focus in this relationship was further analyzed. The results show that information asymmetry partially mediates the effect of digital transformation on firms’ sustained green innovation, while investor focus play a moderating role.
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选取2009—2021年中国A股上市公司为研究样本,探讨数字化转型对企业持续绿色创新的影响。研究发现,数字化转型显著促进了企业持续绿色创新投入和产出,并且这一结论在经过一系列稳健性检验后依然成立。异质性分析结果表明,数字化转型对企业持续绿色创新的促进作用因企业产权性质和行业类型而异。进一步分析信息不对称和投资者关注度在这一关系中的作用,发现信息不对称在数字化转型影响企业持续绿色创新中起部分中介作用,而投资者关注度则起调节作用。
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王璇(1999—),女,河南南阳人,硕士研究生,研究方向为产业经济学、国际经济学。
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王璇(1999—),女,河南南阳人,硕士研究生,研究方向为产业经济学、国际经济学。
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王璇(1999—),女,河南南阳人,硕士研究生,研究方向为产业经济学、国际经济学。
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2021(9): 137-155., articleTitle=数字化转型与企业分工: 专业化还是纵向一体化, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1273680467577573650, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, xref=null, ext=[AuthorCompanyExt(id=1273680467585962259, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, companyId=1273680467577573650, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Business School, Guilin University of Technology, Guilin 541004, Guangxi, China), AuthorCompanyExt(id=1273680467598545172, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, companyId=1273680467577573650, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=桂林理工大学商学院, 广西 桂林 541004)])], figs=[ArticleFig(id=1273680472384246050, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量类型 | 符号 | 变量名称 | 度量方法 |
| 被解释变量 | lnCin | 企业持续绿色创新 | 绿色创新投入持续性 |
| lnCpt | 企业持续绿色创新 | 绿色创新产出持续性 |
| 解释变量 | lnDa | 数字化转型 | 数字化转型相关词频总数加1的对数值 |
| 控制变量 | Age | 企业年龄 | 企业成立年限的自然对数 |
| Size | 企业规模 | 总资产的对数值 |
| Soe | 产权性质 | 国有企业赋值为1,其他为0 |
| Lev | 资产负债率 | 负债总额/资产总计 |
| Roa | 资产收益率 | 净利润/资产总计 |
| Cdum | 两职合一 | 董事长兼任总经理赋值为1,其他为0 |
| Board | 董事会规模 | 董事会总人数 |
| Indir | 独立董事比例 | 独立董事人数/董事会总人数 |
| Balance | 股权制衡度 | 第2~5大股东持股比例/第1大股东持股比例 |
| 中介变量 | Asy | 信息不对称程度 | 以股票流动性指标反映信息不对称程度 |
| 调节变量 | Focus | 投资者关注度 | 百度搜索指数年度中位数的对数值 |
), ArticleFig(id=1273680472753344804, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=CN, label=表1, caption=
变量定义
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量类型 | 符号 | 变量名称 | 度量方法 |
| 被解释变量 | lnCin | 企业持续绿色创新 | 绿色创新投入持续性 |
| lnCpt | 企业持续绿色创新 | 绿色创新产出持续性 |
| 解释变量 | lnDa | 数字化转型 | 数字化转型相关词频总数加1的对数值 |
| 控制变量 | Age | 企业年龄 | 企业成立年限的自然对数 |
| Size | 企业规模 | 总资产的对数值 |
| Soe | 产权性质 | 国有企业赋值为1,其他为0 |
| Lev | 资产负债率 | 负债总额/资产总计 |
| Roa | 资产收益率 | 净利润/资产总计 |
| Cdum | 两职合一 | 董事长兼任总经理赋值为1,其他为0 |
| Board | 董事会规模 | 董事会总人数 |
| Indir | 独立董事比例 | 独立董事人数/董事会总人数 |
| Balance | 股权制衡度 | 第2~5大股东持股比例/第1大股东持股比例 |
| 中介变量 | Asy | 信息不对称程度 | 以股票流动性指标反映信息不对称程度 |
| 调节变量 | Focus | 投资者关注度 | 百度搜索指数年度中位数的对数值 |
), ArticleFig(id=1273680473172775205, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 样本数 | 平均值 | 标准差 | 最小值 | 最大值 |
| lnCin | 12 725 | 5.212 | 1.486 | 1.354 | 9.310 |
| lnCpt | 12 725 | 0.727 | 1.270 | 0.000 | 5.076 |
| lnDa | 12 725 | 1.541 | 1.458 | 0.000 | 5.308 |
| Age | 12 725 | 11.910 | 6.424 | 3.000 | 27.000 |
| Size | 12 725 | 22.450 | 1.232 | 20.140 | 26.320 |
| Soe | 12 725 | 0.378 | 0.485 | 0.000 | 1.000 |
| Lev | 12 725 | 0.427 | 0.190 | 0.067 | 0.863 |
| Roa | 12 725 | 0.033 | 0.066 | -0.300 | 0.197 |
| Cdum | 12 725 | 0.249 | 0.432 | 0.000 | 1.000 |
| Board | 12 725 | 8.578 | 1.605 | 5.000 | 14.000 |
| Indir | 12 725 | 37.490 | 5.385 | 33.330 | 57.140 |
| Balance | 12 725 | 0.704 | 0.574 | 0.034 | 2.642 |
| Asy | 12 725 | -0.344 | 0.452 | -2.037 | 0.386 |
| Focus | 12 477 | 6.836 | 0.664 | 5.384 | 8.778 |
), ArticleFig(id=1273680474745639209, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=CN, label=表2, caption=
变量描述性统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 样本数 | 平均值 | 标准差 | 最小值 | 最大值 |
| lnCin | 12 725 | 5.212 | 1.486 | 1.354 | 9.310 |
| lnCpt | 12 725 | 0.727 | 1.270 | 0.000 | 5.076 |
| lnDa | 12 725 | 1.541 | 1.458 | 0.000 | 5.308 |
| Age | 12 725 | 11.910 | 6.424 | 3.000 | 27.000 |
| Size | 12 725 | 22.450 | 1.232 | 20.140 | 26.320 |
| Soe | 12 725 | 0.378 | 0.485 | 0.000 | 1.000 |
| Lev | 12 725 | 0.427 | 0.190 | 0.067 | 0.863 |
| Roa | 12 725 | 0.033 | 0.066 | -0.300 | 0.197 |
| Cdum | 12 725 | 0.249 | 0.432 | 0.000 | 1.000 |
| Board | 12 725 | 8.578 | 1.605 | 5.000 | 14.000 |
| Indir | 12 725 | 37.490 | 5.385 | 33.330 | 57.140 |
| Balance | 12 725 | 0.704 | 0.574 | 0.034 | 2.642 |
| Asy | 12 725 | -0.344 | 0.452 | -2.037 | 0.386 |
| Focus | 12 477 | 6.836 | 0.664 | 5.384 | 8.778 |
), ArticleFig(id=1273680474829525290, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | (1) | (2) | (3) | (4) |
| lnCin | lnCin | lnCpt | lnCpt |
| lnDa | 0.085*** | 0.024** | 0.038*** | 0.031*** |
| (7.73) | (2.38) | (3.45) | (2.77) |
| Age | | 0.009 | | 0.030 |
| | (0.17) | | (0.42) |
| Size | | 0.793*** | | 0.104*** |
| | (30.89) | | (4.14) |
| Soe | | -0.005 | | 0.034 |
| | (-0.13) | | (0.56) |
| Lev | | -0.209*** | | 0.005 |
| | (-2.64) | | (0.06) |
| Roa | | 0.482*** | | 0.073 |
| | (4.17) | | (0.57) |
| Cdum | | -0.024 | | -0.025 |
| | (-1.20) | | (-0.99) |
| Board | | 0.025*** | | -0.017 |
| | (2.65) | | (-1.60) |
| Indir | | -0.001 | | -0.002 |
| | (-0.29) | | (-0.74) |
| Balance | | 0.095*** | | 0.009 |
| | (4.06) | | (0.33) |
| 常数项 | 5.081*** | -12.917*** | 0.667*** | -1.819* |
| (281.68) | (-14.72) | (36.68) | (-1.79) |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes |
| 样本数 | 12 721 | 12 721 | 12 721 | 12 721 |
| R2 | 0.861 | 0.886 | 0.740 | 0.741 |
), ArticleFig(id=1273680474909217067, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=CN, label=表3, caption=
基准回归结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | (1) | (2) | (3) | (4) |
| lnCin | lnCin | lnCpt | lnCpt |
| lnDa | 0.085*** | 0.024** | 0.038*** | 0.031*** |
| (7.73) | (2.38) | (3.45) | (2.77) |
| Age | | 0.009 | | 0.030 |
| | (0.17) | | (0.42) |
| Size | | 0.793*** | | 0.104*** |
| | (30.89) | | (4.14) |
| Soe | | -0.005 | | 0.034 |
| | (-0.13) | | (0.56) |
| Lev | | -0.209*** | | 0.005 |
| | (-2.64) | | (0.06) |
| Roa | | 0.482*** | | 0.073 |
| | (4.17) | | (0.57) |
| Cdum | | -0.024 | | -0.025 |
| | (-1.20) | | (-0.99) |
| Board | | 0.025*** | | -0.017 |
| | (2.65) | | (-1.60) |
| Indir | | -0.001 | | -0.002 |
| | (-0.29) | | (-0.74) |
| Balance | | 0.095*** | | 0.009 |
| | (4.06) | | (0.33) |
| 常数项 | 5.081*** | -12.917*** | 0.667*** | -1.819* |
| (281.68) | (-14.72) | (36.68) | (-1.79) |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes |
| 样本数 | 12 721 | 12 721 | 12 721 | 12 721 |
| R2 | 0.861 | 0.886 | 0.740 | 0.741 |
), ArticleFig(id=1273680474997297452, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 滞后一期 | 替换变量 |
| (1) | (2) | (3) | (4) | (5) | (6) |
| lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt |
| L.lnDa | 0.020** | 0.026** | | | | |
| (2.02) | (2.01) | | | | |
| lnDb | | | 0.058*** | 0.040*** | | |
| | | (4.89) | (3.17) | | |
| YpDa | | | | | 0.028** | 0.025 |
| | | | | (2.03) | (1.36) |
| 常数项 | -13.020*** | -2.213* | -12.934*** | -1.889* | -13.177*** | -1.988* |
| (-14.02) | (-1.80) | (-14.80) | (-1.86) | (-14.66) | (-1.94) |
| Controls | Yes | Yes | Yes | Yes | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes | Yes | Yes |
| 样本数 | 10 360 | 10 360 | 12 721 | 12 721 | 12 486 | 12 486 |
| R2 | 0.906 | 0.767 | 0.886 | 0.741 | 0.886 | 0.743 |
), ArticleFig(id=1273680475072794925, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=CN, label=表4, caption=
稳健性检验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 滞后一期 | 替换变量 |
| (1) | (2) | (3) | (4) | (5) | (6) |
| lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt |
| L.lnDa | 0.020** | 0.026** | | | | |
| (2.02) | (2.01) | | | | |
| lnDb | | | 0.058*** | 0.040*** | | |
| | | (4.89) | (3.17) | | |
| YpDa | | | | | 0.028** | 0.025 |
| | | | | (2.03) | (1.36) |
| 常数项 | -13.020*** | -2.213* | -12.934*** | -1.889* | -13.177*** | -1.988* |
| (-14.02) | (-1.80) | (-14.80) | (-1.86) | (-14.66) | (-1.94) |
| Controls | Yes | Yes | Yes | Yes | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes | Yes | Yes |
| 样本数 | 10 360 | 10 360 | 12 721 | 12 721 | 12 486 | 12 486 |
| R2 | 0.906 | 0.767 | 0.886 | 0.741 | 0.886 | 0.743 |
), ArticleFig(id=1273680475160875310, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 国有企业 | 非国有企业 | 重污染企业 | 非重污染企业 |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
| lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt |
| lnDa | 0.046** | 0.079*** | 0.008 | -0.001 | 0.018 | 0.028 | 0.033*** | 0.026* |
| (2.40) | (3.72) | (0.63) | (-0.09) | (0.91) | (1.48) | (2.81) | (1.86) |
| 常数项 | -14.990*** | -0.866 | -11.775*** | -2.572** | -11.938*** | -2.526 | -13.661*** | -1.757 |
| (-9.73) | (-0.53) | (-9.07) | (-1.98) | (-7.27) | (-1.08) | (-13.30) | (-1.49) |
| Controls | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 样本数 | 4 779 | 4 779 | 7 889 | 7 889 | 4 170 | 4 170 | 8 350 | 8 350 |
| R2 | 0.891 | 0.779 | 0.885 | 0.715 | 0.848 | 0.692 | 0.909 | 0.757 |
), ArticleFig(id=1273680475244761391, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=CN, label=表5, caption=
企业产权性质和行业类型异质性检验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 国有企业 | 非国有企业 | 重污染企业 | 非重污染企业 |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
| lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt |
| lnDa | 0.046** | 0.079*** | 0.008 | -0.001 | 0.018 | 0.028 | 0.033*** | 0.026* |
| (2.40) | (3.72) | (0.63) | (-0.09) | (0.91) | (1.48) | (2.81) | (1.86) |
| 常数项 | -14.990*** | -0.866 | -11.775*** | -2.572** | -11.938*** | -2.526 | -13.661*** | -1.757 |
| (-9.73) | (-0.53) | (-9.07) | (-1.98) | (-7.27) | (-1.08) | (-13.30) | (-1.49) |
| Controls | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| 样本数 | 4 779 | 4 779 | 7 889 | 7 889 | 4 170 | 4 170 | 8 350 | 8 350 |
| R2 | 0.891 | 0.779 | 0.885 | 0.715 | 0.848 | 0.692 | 0.909 | 0.757 |
), ArticleFig(id=1273680475332841776, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 成长期 | 成熟期 | 衰退期 |
| lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt |
| lnDa | 0.015 | 0.009 | 0.039** | 0.066*** | -0.028 | 0.000 |
| (0.85) | (0.46) | (2.13) | (3.06) | (-0.75) | (0.01) |
| 常数项 | -13.029*** | 0.924 | -13.316*** | -5.028** | -14.681*** | -2.843 |
| (-8.38) | (0.35) | (-8.08) | (-2.31) | (-3.82) | (-0.99) |
| Controls | Yes | Yes | Yes | Yes | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes | Yes | Yes |
| 样本数 | 5 059 | 5 059 | 4 478 | 4 478 | 1 825 | 1 825 |
| R2 | 0.902 | 0.762 | 0.905 | 0.801 | 0.918 | 0.826 |
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企业生命周期异质性检验结果
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| 变量 | 成长期 | 成熟期 | 衰退期 |
| lnCin | lnCpt | lnCin | lnCpt | lnCin | lnCpt |
| lnDa | 0.015 | 0.009 | 0.039** | 0.066*** | -0.028 | 0.000 |
| (0.85) | (0.46) | (2.13) | (3.06) | (-0.75) | (0.01) |
| 常数项 | -13.029*** | 0.924 | -13.316*** | -5.028** | -14.681*** | -2.843 |
| (-8.38) | (0.35) | (-8.08) | (-2.31) | (-3.82) | (-0.99) |
| Controls | Yes | Yes | Yes | Yes | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes | Yes | Yes | Yes | Yes |
| 样本数 | 5 059 | 5 059 | 4 478 | 4 478 | 1 825 | 1 825 |
| R2 | 0.902 | 0.762 | 0.905 | 0.801 | 0.918 | 0.826 |
), ArticleFig(id=1273680475542556978, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | (1) | (2) | (3) |
| Asy | lnCin | lnCpt |
| lnDa | -0.007** | 0.023** | 0.030*** |
| (-2.10) | (2.28) | (2.71) |
| Asy | | -0.138*** | -0.099*** |
| | (-5.29) | (-2.89) |
| 常数项 | 5.705*** | -12.130*** | -1.254 |
| (14.27) | (-13.23) | (-1.22) |
| Controls | Yes | Yes | Yes |
| Id/Year /Ind FE | Yes | Yes | Yes |
| 样本数 | 12 721 | 12 721 | 12 721 |
| R2 | 0.793 | 0.886 | 0.741 |
), ArticleFig(id=1273680475685163315, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=CN, label=表7, caption=
中介效应检验结果
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| 变量 | (1) | (2) | (3) |
| Asy | lnCin | lnCpt |
| lnDa | -0.007** | 0.023** | 0.030*** |
| (-2.10) | (2.28) | (2.71) |
| Asy | | -0.138*** | -0.099*** |
| | (-5.29) | (-2.89) |
| 常数项 | 5.705*** | -12.130*** | -1.254 |
| (14.27) | (-13.23) | (-1.22) |
| Controls | Yes | Yes | Yes |
| Id/Year /Ind FE | Yes | Yes | Yes |
| 样本数 | 12 721 | 12 721 | 12 721 |
| R2 | 0.793 | 0.886 | 0.741 |
), ArticleFig(id=1273680475752272180, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1153984493259055346, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | (1) | (2) |
| lnCin | lnCpt |
| lnDa | 0.022** | 0.024** |
| (2.19) | (2.11) |
| Focus | 0.075*** | 0.079*** |
| (3.37) | (2.86) |
| lnDa×Focus | 0.018* | 0.060*** |
| (1.94) | (5.22) |
| 常数项 | -13.585*** | -1.914* |
| (-15.31) | (-1.92) |
| Controls | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes |
| 样本数 | 12 472 | 12 472 |
| R2 | 0.889 | 0.746 |
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调节效应检验结果
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| 变量 | (1) | (2) |
| lnCin | lnCpt |
| lnDa | 0.022** | 0.024** |
| (2.19) | (2.11) |
| Focus | 0.075*** | 0.079*** |
| (3.37) | (2.86) |
| lnDa×Focus | 0.018* | 0.060*** |
| (1.94) | (5.22) |
| 常数项 | -13.585*** | -1.914* |
| (-15.31) | (-1.92) |
| Controls | Yes | Yes |
| Id/Year/Ind FE | Yes | Yes |
| 样本数 | 12 472 | 12 472 |
| R2 | 0.889 | 0.746 |
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