Article(id=1316698357632979476, tenantId=1146029695717560320, journalId=1308397381743640680, issueId=1316695224617914963, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1729094400000, receivedDateStr=2024-10-17, revisedDate=1733932800000, revisedDateStr=2024-12-12, acceptedDate=null, acceptedDateStr=null, onlineDate=1791854951532, onlineDateStr=2026-10-13, pubDate=1768406400000, pubDateStr=2026-01-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791854951532, onlineIssueDateStr=2026-10-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791854951532, creator=13701087609, updateTime=1791854951532, updator=13701087609, issue=Issue{id=1316695224617914963, tenantId=1146029695717560320, journalId=1308397381743640680, year='2026', volume='44', issue='1', pageStart='1', pageEnd='224', issueExtLink='null', onlineDate='null', pubDate='1768406400000', pubDateStr='2026-01-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1791854204563, creator='13701087609', updateTime=1791854713654, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1316697359963239159, tenantId=1146029695717560320, journalId=1308397381743640680, issueId=1316695224617914963, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1316697359963239160, tenantId=1146029695717560320, journalId=1308397381743640680, issueId=1316695224617914963, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=141, endPage=153, ext={EN=ArticleExt(id=1316698357913997846, articleId=1316698357632979476, tenantId=1146029695717560320, journalId=1308397381743640680, language=EN, title=Technological specialization and the breakthrough in key core technologies of SRDI enterprises, columnId=1309226334803550422, journalTitle=Studies in Science of Science, columnName=Innovation Explorations, runingTitle=null, highlight=null, articleAbstract=
The intensified competition amidst the new round of technological changes and industrial revolutions has led to substantial advancements in the manufacturing industry. However, there is a notable dependency on imports in key core technology areas, such as next-generation information technology and biomedical industry, posing significant challenges. In response, the report of the 20th National Congress of the Communist Party of China in 2022 made important strategic deployments, proposing to resolutely win the battle for mastering key core technologies. The unique and in-depth professional technology accumulated by enterprises in specific knowledge fields for a long time is the key driving force to promote the breakthrough of key core technologies. In this context, SRID enterprises, leveraging their professional expertise and deep cultivation in specific segments of the industrial chain, are crucial for breaking through key core technologies.
There is a consensus in literature on the importance of knowledge resources in driving breakthroughs in key core technologies. However, existing research primarily focus on exploring this through collaboration networks, lacking literature that examines the impact mechanism of a firm's internal knowledge base on key core technology breakthrough, especially empirical research on the degree of technological specialization among SRDI enterprises.
This study takes the new generation of information technology industry in the first five batches of listed small giant enterprises in China as the research object, and deeply explores the effect of technological specialization on the breakthrough of key core technologies, the mediating role played by knowledge search in this process, and the moderating role of knowledge integration capabilities. The results show that there is an inverted U-shaped relationship between technology specialization, knowledge search and key core technology breakthroughs. A firm's specialized knowledge base and externally searched heterogeneous knowledge provide a direct resource base for breakthrough innovations in key core technology fields. The moderating effect analysis shows that the inverted “U” shaped relationship between technology specialization and key core technology breakthroughs is mediated by knowledge search. Enterprises will conduct knowledge searches based on their own knowledge characteristics and, through continuous cooperation and exchanges with the outside world, provide more extensive or in-depth heterogeneous knowledge resources for breakthrough innovations in key core technology fields, thereby freeing enterprises from resource constraints. In addition, knowledge integration ability moderates the role of technology specialization and knowledge search on key core technology breakthroughs, respectively. High knowledge integration ability will alleviate the negative impact of over-specialization and over-search, and when it breaks through a certain threshold, it can completely offset the negative impact and further promote key core technology breakthroughs.
These findings hold significant importance for enterprises to facilitate knowledge search by deepening their own specialized knowledge, thereby promoting breakthroughs in key core technologies: (1) SRDI enterprises should deepen core technology research while exploring diversified technologies, forming dedicated teams and building a knowledge base to avoid the specialization trap. (2) SRDI enterprises should integrate internal and external resources by collaborating across sectors and deeply mining existing knowledge, utilizing advanced tools for systematic analysis and integration. (3) Constructing a knowledge sharing platform and nurturing a multidisciplinary team will enhance resource integration, facilitating efficient knowledge conversion and application.
This study emphasizes the complementary synergy between knowledge search and technology specialization, expands the research scope of key core technology breakthroughs at the micro level, and provides theoretical guidance and decision-making reference for enterprises to promote key core technology breakthroughs.
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企业在特定知识领域内长期积累形成的专业化技术,是推动关键核心技术突破的重要驱动力。本研究以我国前五批上市的专精特新小巨人企业中新一代信息技术产业为研究对象,深入探索技术专业化对关键核心技术突破的作用效应以及内在机制。研究发现,技术专业化、知识搜索分别与关键核心技术突破呈倒U型关系;知识搜索中介了技术专业化与关键核心技术突破的倒U型关系;高知识整合能力会缓解过度专业化以及过度搜索带来的负面影响,且当其突破某门槛时,可完全抵消负面影响。本研究强调了知识搜索与技术专业化之间的互补作用,拓展了关键核心技术突破的研究范畴,为企业推动关键核心技术突破提供参考。
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孙倩如(2002-),女,硕士研究生。
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Theoretical model, figureFileSmall=Zo+uI9EIYEr8OpW1ZX5TuQ==, figureFileBig=4DkKTrn6SiK7C/5vu+s2Zg==, tableContent=null), ArticleFig(id=1316698362963939906, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=图1, caption=
理论模型, figureFileSmall=Zo+uI9EIYEr8OpW1ZX5TuQ==, figureFileBig=4DkKTrn6SiK7C/5vu+s2Zg==, tableContent=null), ArticleFig(id=1316698363148489283, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Figure 2, caption=
Schematic diagram of the moderating effect between technological specialization and key core technology breakthrough, figureFileSmall=euWOEEwGXDpGUmbH48sRNA==, figureFileBig=Z2PHmijpMinC8mgSLtNJMw==, tableContent=null), ArticleFig(id=1316698363215598148, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=图2, caption=
技术专业化与关键核心技术调节效应图, figureFileSmall=euWOEEwGXDpGUmbH48sRNA==, figureFileBig=Z2PHmijpMinC8mgSLtNJMw==, tableContent=null), ArticleFig(id=1316698363291095621, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Figure 3, caption=
Schematic diagram of the moderating effect between knowledge search and key core technology reakthrough, figureFileSmall=KQer9LLTKEVnz4pMTFaJ6A==, figureFileBig=bfYC/hQCE8Di75ImAUOi/Q==, tableContent=null), ArticleFig(id=1316698363349815878, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=图3, caption=
搜索深度与关键核心技术调节效应图, figureFileSmall=KQer9LLTKEVnz4pMTFaJ6A==, figureFileBig=bfYC/hQCE8Di75ImAUOi/Q==, tableContent=null), ArticleFig(id=1316698363421119047, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Figure 4, caption=
Changes of moderating effect and inverted U-shaped curve, figureFileSmall=7o3a8AkxZjP9bGvSQhbEhw==, figureFileBig=b0LuAoPI7WOCdDcQS0WMUA==, tableContent=null), ArticleFig(id=1316698363492422216, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=图4, caption=
调节效应与倒U型曲线变化, figureFileSmall=7o3a8AkxZjP9bGvSQhbEhw==, figureFileBig=b0LuAoPI7WOCdDcQS0WMUA==, tableContent=null), ArticleFig(id=1316698365119812170, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Table 1, caption=
Measurement of critical core technologies
, figureFileSmall=null, figureFileBig=null, tableContent=
| 特征维度 | 测度指标 | 专利指标 |
| 核心技术基础性 | 科学关联度 | 非专利文献引用量 |
| 技术累积度 | 引用专利数量 |
| 权利要求 | 权力要求数量 |
| 核心技术体系性 | 社会价值 | 3年内被引用次数 |
| 合作范围 | 专利权人数量 |
| 核心技术竞争性 | 同族专利 | 同族成员数量 |
| 技术覆盖范围 | 跨部IPC分类号数量 |
), ArticleFig(id=1316698365249835595, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=表1, caption=
关键核心技术指标测度方式
, figureFileSmall=null, figureFileBig=null, tableContent=
| 特征维度 | 测度指标 | 专利指标 |
| 核心技术基础性 | 科学关联度 | 非专利文献引用量 |
| 技术累积度 | 引用专利数量 |
| 权利要求 | 权力要求数量 |
| 核心技术体系性 | 社会价值 | 3年内被引用次数 |
| 合作范围 | 专利权人数量 |
| 核心技术竞争性 | 同族专利 | 同族成员数量 |
| 技术覆盖范围 | 跨部IPC分类号数量 |
), ArticleFig(id=1316698365463745100, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Table 2, caption=
Variable definitions and measurements
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量类型 | 变量符号 | 变量名称 | 测量方法 |
| 被解释变量 | CKTB | 关键核心技术突破 | 关键核心技术得分的均值 |
| 解释变量 | TS | 技术专业化 | 见公式(1)(2) |
| 中介变量 | SB | 搜索广度 | 见公式(3) |
| SD | 搜索深度 | 见公式(4) |
| 调节变量 | KIC | 知识整合能力 | 第t-5至t年间企业跨越IPC号前四位的专利类别数量 |
| 控制变量 | Age | 企业年龄 | 企业成立年限加1取自然对数 |
| Size | 企业规模 | 企业员工总数取自然对数 |
| SOE | 所有权性质 | 国有企业取值为1,其余为0 |
| Top1 | 股权集中度 | 第一大股东持股数量/总股数 |
| ROA | 资产收益率 | 净利润/资产总额 |
| Lev | 财务杠杆 | 负债总额/资产总额 |
| TobinQ | 企业绩效 | 企业托宾Q值 |
), ArticleFig(id=1316698365681848909, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=表2, caption=
变量定义及测量方法
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量类型 | 变量符号 | 变量名称 | 测量方法 |
| 被解释变量 | CKTB | 关键核心技术突破 | 关键核心技术得分的均值 |
| 解释变量 | TS | 技术专业化 | 见公式(1)(2) |
| 中介变量 | SB | 搜索广度 | 见公式(3) |
| SD | 搜索深度 | 见公式(4) |
| 调节变量 | KIC | 知识整合能力 | 第t-5至t年间企业跨越IPC号前四位的专利类别数量 |
| 控制变量 | Age | 企业年龄 | 企业成立年限加1取自然对数 |
| Size | 企业规模 | 企业员工总数取自然对数 |
| SOE | 所有权性质 | 国有企业取值为1,其余为0 |
| Top1 | 股权集中度 | 第一大股东持股数量/总股数 |
| ROA | 资产收益率 | 净利润/资产总额 |
| Lev | 财务杠杆 | 负债总额/资产总额 |
| TobinQ | 企业绩效 | 企业托宾Q值 |
), ArticleFig(id=1316698365753152078, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Table 3, caption=
Benchmark regression analysis
, figureFileSmall=null, figureFileBig=null, tableContent=
| model1 | model2 | model3 | model4 | model5 | model6 | model7 | model8 | model9 | model10 |
| VARIABLES | CKTB | CKTB | SB | SD | SB | SD | CKTB | CKTB | CKTB | CKTB |
| TS | | 0.070*** | | | 0.047** | 0.058*** | | | 0.034** | 0.039** |
| | (3.35) | | | (2.03) | (3.50) | | | (2.18) | (2.22) |
| TS_sq | | -0.019*** | | | | | | | -0.011** | -0.011** |
| | (-3.09) | | | | | | | (-2.29) | (-2.11) |
| SB | | | | | | | 0.203*** | | 0.200*** | |
| | | | | | | (8.10) | | (8.29) | |
| SB_sq | | | | | | | -0.154*** | | -0.151*** | |
| | | | | | | (-7.60) | | (-7.82) | |
| SD | | | | | | | | 0.082*** | | 0.074*** |
| | | | | | | | (3.81) | | (3.43) |
| SD_sq | | | | | | | | -0.032*** | | -0.029*** |
| | | | | | | | (-3.74) | | (-3.49) |
| 控制变量 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 0.138*** | 0.103** | 0.244 | 0.096 | 0.236 | 0.086 | 0.102*** | 0.144*** | 0.084** | 0.124*** |
| (3.36) | (2.47) | (1.22) | (0.76) | (1.18) | (0.70) | (2.92) | (3.83) | (2.33) | (3.08) |
| Observations | 615 | 615 | 608 | 608 | 608 | 608 | 608 | 608 | 608 | 608 |
| R-squared | 0.254 | 0.298 | 0.140 | 0.064 | 0.147 | 0.088 | 0.411 | 0.276 | 0.420 | 0.288 |
| F | 1.920 | 3.000 | 1.314 | 1.546 | 1.567 | 2.553 | 8.470 | 3.385 | 7.473 | 3.474 |
), ArticleFig(id=1316698365832843855, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=表3, caption=
基准回归结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| model1 | model2 | model3 | model4 | model5 | model6 | model7 | model8 | model9 | model10 |
| VARIABLES | CKTB | CKTB | SB | SD | SB | SD | CKTB | CKTB | CKTB | CKTB |
| TS | | 0.070*** | | | 0.047** | 0.058*** | | | 0.034** | 0.039** |
| | (3.35) | | | (2.03) | (3.50) | | | (2.18) | (2.22) |
| TS_sq | | -0.019*** | | | | | | | -0.011** | -0.011** |
| | (-3.09) | | | | | | | (-2.29) | (-2.11) |
| SB | | | | | | | 0.203*** | | 0.200*** | |
| | | | | | | (8.10) | | (8.29) | |
| SB_sq | | | | | | | -0.154*** | | -0.151*** | |
| | | | | | | (-7.60) | | (-7.82) | |
| SD | | | | | | | | 0.082*** | | 0.074*** |
| | | | | | | | (3.81) | | (3.43) |
| SD_sq | | | | | | | | -0.032*** | | -0.029*** |
| | | | | | | | (-3.74) | | (-3.49) |
| 控制变量 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 0.138*** | 0.103** | 0.244 | 0.096 | 0.236 | 0.086 | 0.102*** | 0.144*** | 0.084** | 0.124*** |
| (3.36) | (2.47) | (1.22) | (0.76) | (1.18) | (0.70) | (2.92) | (3.83) | (2.33) | (3.08) |
| Observations | 615 | 615 | 608 | 608 | 608 | 608 | 608 | 608 | 608 | 608 |
| R-squared | 0.254 | 0.298 | 0.140 | 0.064 | 0.147 | 0.088 | 0.411 | 0.276 | 0.420 | 0.288 |
| F | 1.920 | 3.000 | 1.314 | 1.546 | 1.567 | 2.553 | 8.470 | 3.385 | 7.473 | 3.474 |
), ArticleFig(id=1316698366092890704, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Table 4, caption=
Regression models of the moderating effect
, figureFileSmall=null, figureFileBig=null, tableContent=
| model11 | model12 | model13 | model14 | model15 | model16 |
| VARIABLES | CKTB | CKTB | CKTB | CKTB | CKTB | CKTB |
| TS | 0.009*** | | | 0.005 | | |
| (2.94) | | | (1.46) | | |
| TS_sq | -0.007*** | | | -0.004* | | |
| (-3.09) | | | (-1.93) | | |
| SB | | 0.006*** | | | 0.005** | |
| | (2.71) | | | (2.44) | |
| SB_sq | | -0.012*** | | | -0.012*** | |
| | (-7.49) | | | (-7.62) | |
| SD | | | 0.014*** | | | 0.016*** |
| | | (3.68) | | | (4.13) |
| SD_sq | | | -0.001*** | | | -0.001*** |
| | | (-3.64) | | | (-3.60) |
| TS* KIC | | | | -0.005 | | |
| | | | (-1.40) | | |
| TS_sq * KIC | | | | 0.004* | | |
| | | | (1.88) | | |
| SB* KIC | | | | | -0.002 | |
| | | | | (-0.83) | |
| SB_sq * KIC | | | | | 0.003** | |
| | | | | (2.60) | |
| SD* KIC | | | | | | -0.009*** |
| | | | | | (-3.01) |
| SD_sq* KIC | | | | | | 0.001** |
| | | | | | (2.56) |
| KIC | 0.001 | -0.000 | 0.001 | -0.001 | -0.004 | 0.001 |
| (0.45) | (-0.22) | (0.29) | (-0.26) | (-1.43) | (0.24) |
| 控制变量 | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 0.167*** | 0.167*** | 0.152*** | 0.155*** | 0.157*** | 0.147*** |
| (4.62) | (4.97) | (4.02) | (4.30) | (4.54) | (3.96) |
| Observations | 615 | 608 | 608 | 615 | 608 | 608 |
| R-squared | 0.298 | 0.411 | 0.276 | 0.306 | 0.423 | 0.288 |
| F | 2.784 | 7.583 | 3.028 | 2.939 | 7.531 | 5.135 |
), ArticleFig(id=1316698366180971089, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=表4, caption=
调节效应回归结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| model11 | model12 | model13 | model14 | model15 | model16 |
| VARIABLES | CKTB | CKTB | CKTB | CKTB | CKTB | CKTB |
| TS | 0.009*** | | | 0.005 | | |
| (2.94) | | | (1.46) | | |
| TS_sq | -0.007*** | | | -0.004* | | |
| (-3.09) | | | (-1.93) | | |
| SB | | 0.006*** | | | 0.005** | |
| | (2.71) | | | (2.44) | |
| SB_sq | | -0.012*** | | | -0.012*** | |
| | (-7.49) | | | (-7.62) | |
| SD | | | 0.014*** | | | 0.016*** |
| | | (3.68) | | | (4.13) |
| SD_sq | | | -0.001*** | | | -0.001*** |
| | | (-3.64) | | | (-3.60) |
| TS* KIC | | | | -0.005 | | |
| | | | (-1.40) | | |
| TS_sq * KIC | | | | 0.004* | | |
| | | | (1.88) | | |
| SB* KIC | | | | | -0.002 | |
| | | | | (-0.83) | |
| SB_sq * KIC | | | | | 0.003** | |
| | | | | (2.60) | |
| SD* KIC | | | | | | -0.009*** |
| | | | | | (-3.01) |
| SD_sq* KIC | | | | | | 0.001** |
| | | | | | (2.56) |
| KIC | 0.001 | -0.000 | 0.001 | -0.001 | -0.004 | 0.001 |
| (0.45) | (-0.22) | (0.29) | (-0.26) | (-1.43) | (0.24) |
| 控制变量 | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 0.167*** | 0.167*** | 0.152*** | 0.155*** | 0.157*** | 0.147*** |
| (4.62) | (4.97) | (4.02) | (4.30) | (4.54) | (3.96) |
| Observations | 615 | 608 | 608 | 615 | 608 | 608 |
| R-squared | 0.298 | 0.411 | 0.276 | 0.306 | 0.423 | 0.288 |
| F | 2.784 | 7.583 | 3.028 | 2.939 | 7.531 | 5.135 |
), ArticleFig(id=1316698366260662866, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Table 5, caption=
Robustness test
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| model17 | model18 | model19 | model20 | model21 | model22 | model23 | model24 | model25 |
| VARIABLES | F.CKTB | F3.CKTB | F5.CKTB | CKTB_Top10 | 专利申请量 | 专利申请量 | CKTB | CKTB | CKTB |
| TS | 0.087*** | 0.041** | 0.045** | 3.097*** | 0.842*** | 1.833*** | 0.071*** | 1.423*** | 0.073*** |
| (3.86) | (2.56) | (2.08) | (4.41) | (7.36) | (4.71) | (3.38) | (2.91) | (3.60) |
| TS_sq | -0.025*** | -0.010** | -0.011* | -0.639*** | | -0.327*** | -0.019*** | -0.267* | -0.021*** |
| (-3.61) | (-2.00) | (-1.95) | (-3.15) | | (-2.77) | (-3.09) | (-1.75) | (-3.16) |
| 控制变量 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 0.123*** | 0.094** | 0.147*** | -2.984** | 0.571 | 0.088 | 0.119*** | -3.869* | 0.114** |
| (2.71) | (2.46) | (3.06) | (-2.42) | (0.71) | (0.10) | (2.64) | (-1.74) | (2.05) |
| Observations | 477 | 270 | 154 | 617 | 617 | 617 | 615 | 612 | 248 |
| R-squared | 0.325 | 0.355 | 0.279 | | | | 0.294 | | 0.404 |
| F | 3.728 | 5.182 | 1.645 | . | . | . | 2.623 | . | 4.534 |
), ArticleFig(id=1316698366352937555, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=表5, caption=
稳健性检验
, figureFileSmall=null, figureFileBig=null, tableContent=
| model17 | model18 | model19 | model20 | model21 | model22 | model23 | model24 | model25 |
| VARIABLES | F.CKTB | F3.CKTB | F5.CKTB | CKTB_Top10 | 专利申请量 | 专利申请量 | CKTB | CKTB | CKTB |
| TS | 0.087*** | 0.041** | 0.045** | 3.097*** | 0.842*** | 1.833*** | 0.071*** | 1.423*** | 0.073*** |
| (3.86) | (2.56) | (2.08) | (4.41) | (7.36) | (4.71) | (3.38) | (2.91) | (3.60) |
| TS_sq | -0.025*** | -0.010** | -0.011* | -0.639*** | | -0.327*** | -0.019*** | -0.267* | -0.021*** |
| (-3.61) | (-2.00) | (-1.95) | (-3.15) | | (-2.77) | (-3.09) | (-1.75) | (-3.16) |
| 控制变量 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | 0.123*** | 0.094** | 0.147*** | -2.984** | 0.571 | 0.088 | 0.119*** | -3.869* | 0.114** |
| (2.71) | (2.46) | (3.06) | (-2.42) | (0.71) | (0.10) | (2.64) | (-1.74) | (2.05) |
| Observations | 477 | 270 | 154 | 617 | 617 | 617 | 615 | 612 | 248 |
| R-squared | 0.325 | 0.355 | 0.279 | | | | 0.294 | | 0.404 |
| F | 3.728 | 5.182 | 1.645 | . | . | . | 2.623 | . | 4.534 |
), ArticleFig(id=1316698366436823636, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=EN, label=Table 6, caption=
Endogeneity test
, figureFileSmall=null, figureFileBig=null, tableContent=
| model26 | model27 |
| VARIABLES | CKTB | CKTB |
| L.CKTB | 0.150 | |
| (1.47) | |
| L2.CKTB | | 0.205** |
| | (2.59) |
| TS | 0.070*** | 0.069*** |
| (3.65) | (3.48) |
| TS_sq | -0.020*** | -0.018*** |
| (-3.46) | (-3.21) |
| 控制变量 | Yes | Yes |
| Constant | 0.078* | 0.053 |
| (1.68) | (1.21) |
| Observations | 480 | 362 |
| R-squared | 0.336 | 0.368 |
| F | 3.452 | 4.497 |
), ArticleFig(id=1316698366508126805, tenantId=1146029695717560320, journalId=1308397381743640680, articleId=1316698357632979476, language=CN, label=表6, caption=
内生性检验
, figureFileSmall=null, figureFileBig=null, tableContent=
| model26 | model27 |
| VARIABLES | CKTB | CKTB |
| L.CKTB | 0.150 | |
| (1.47) | |
| L2.CKTB | | 0.205** |
| | (2.59) |
| TS | 0.070*** | 0.069*** |
| (3.65) | (3.48) |
| TS_sq | -0.020*** | -0.018*** |
| (-3.46) | (-3.21) |
| 控制变量 | Yes | Yes |
| Constant | 0.078* | 0.053 |
| (1.68) | (1.21) |
| Observations | 480 | 362 |
| R-squared | 0.336 | 0.368 |
| F | 3.452 | 4.497 |
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