ECIN Replication Package for "Temporary Employment and the Protection of Investments in Human Capital: Examining the Major League Baseball Player Market"

The data included in this replication package include Major League Baseball player performance and contract data. The study looks at how temporary/permanent employment status of MLB players impacts injury management. The study's abstract is as follows:<br><br>When employees are employed in a temporary capacity, employers should be less willing to invest in their human capital relative to permanent employees. This study uses the context of injury management by Major League Baseball teams to test for differential investment in the protection of player human capital. Injury management is inherently uncertain as medical professionals can give differing opinions, so teams may be able to influence recovery times. Using a panel dataset and estimating player fixed-effects regressions, players are found to miss significantly fewer games to injury when employed on a temporary basis. <br>

本复现包所收录的数据涵盖美国职业棒球大联盟（Major League Baseball，MLB）球员的赛事表现与合同数据。本研究旨在探讨美国职业棒球大联盟球员的临时/固定雇佣身份对其伤病管理的影响。该研究的摘要如下：

当雇员以临时雇佣身份任职时，相较于固定雇员，雇主对其人力资本的投资意愿通常更低。本研究以美国职业棒球大联盟球队的伤病管理场景为研究背景，检验球队在保护球员人力资本方面的差异化投资行为。伤病管理本身具有内在不确定性——医疗专业人员可能给出不同的诊疗意见，因此球队可对球员的康复时长施加影响。本研究采用面板数据集（panel dataset）并构建球员固定效应回归模型进行估计，结果发现，临时雇佣的球员因伤缺席的比赛场次显著更少。