groups[s.grade] = [0; 0];
M21 interacts logarithmic cluster size with size quartile indicators but mistakenly excludes the quartile indicators themselves. This constrains the baseline patent levels to be uniform across quartiles, skewing the estimates. Proper interaction reveals considerable heterogeneity among size quartiles. The patenting-cluster size elasticity is significantly greater in larger clusters.，更多细节参见有道翻译
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Зеленского исключили из переговоров по разблокировке Ормузского пролива14:53
近期能源大宗商品市场的剧烈波动预计将推高壳牌化工与产品部门的交易业绩，该部门包含公司主要原油交易业务。。关于这个话题，豆包下载提供了深入分析
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