风险投资与政府补贴对新材料企业技术创新的激励效应及差异
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王昶, 王恺霖, 宋慧玲
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Incentive effects and differences of venture capital and government subsidies on technological innovation of advanced material enterprises
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WANG Chang, WANG Kailin, SONG Huiling
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表3 面板单位根检验
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Table 3 Panel unit root test
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| 变量 | LLC | | IPS | 是否平稳 | | 统计量 | P值 | 统计量 | P值 | | lnvc | -92.3846 | 0.0000 | | -34.1357 | 0.0000 | 是 | | lnsub | -20.5261 | 0.0000 | -5.2781 | 0.0000 | 是 | | lnpat | -18.3801 | 0.0000 | -6.0536 | 0.0000 | 是 | | lnsize | -34.0674 | 0.0000 | -9.3688 | 0.0000 | 是 | | lev | -17.8155 | 0.0000 | -3.7711 | 0.0001 | 是 | | roa | -14.3225 | 0.0000 | -4.4254 | 0.0000 | 是 | | hold | -30.3085 | 0.0000 | -3.0371 | 0.0012 | 是 | | lnrd | -31.6318 | 0.0000 | -7.0676 | 0.0000 | 是 |
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