机译:人力资本阀门数量模型与投资特征研究
Population, Resources and Environment College, Shandong Normal University, Jinan Shandong 250014, China;
Population, Resources and Environment College, Shandong Normal University, Jinan Shandong 250014, China;
Population, Resources and Environment College, Shandong Normal University, Jinan Shandong 250014, China;
human capital; value; measure; profit margin;