基于稀缺状态下的行为决策理论，通过两个研究探讨了主观社会经济地位对心理契约建构及工作投入的影响，并考察了社会支持感的调节作用。研究1通过经验取样法的实地问卷调研发现：主观社会经济地位通过促进关系型契约而非交易型契约进而提升工作投入；社会支持感强化了主观社会经济地位对关系型契约的正向影响和对交易型契约的负向影响，且显著调节了主观社会经济地位通过关系型契约而非交易型契约对工作投入的间接效应。研究2基于224位员工的多时点问卷数据，进一步验证了研究1的主要结论，同时发现社会支持感显著调节了主观社会经济地位通过关系型契约与交易型契约影响工作投入的双路径间接效应。

Drawing on the behavioral perspective on decisions under scarcity, this study investigates how subjective socioeconomic status (SSES) influences psychological contract formation and work engagement, and examines the moderating effect of perceived social support across two studies. Based on a field survey employing experience sampling method, Study 1 revealed that SSES was positively associated with relational contract, which in turn predicted higher work engagement. However, the negative association between SSES and transactional contract was not supported. Perceived social support significantly strengthened the positive relationship between SSES and relational contract, as well as the negative relationship between SSES and transactional contract. Moreover, perceived social support moderated the indirect effect of SSES on work engagement through relational contract, but not through transactional contract. Study 2, utilizing multi-wave survey data from 224 employees, further validated the primary findings of Study 1. Study 2 also found that perceived social support significantly moderated the indirect effects of SSES on work engagement through both relational and transactional contracts.