Studies have shown that availability for work during non-work hours can impair well-being. However, there are significant inter-individual differences regarding these effects. Referring to the “effort–reward–imbalance” model and the “stress-as-offense-to-self” model, the purpose of this paper is to investigate the role that perceived advantages as well as the illegitimacy of extended availability plays in explaining the inter-individual differences.,A total of 310 participants completed an online questionnaire that measured extended availability, illegitimacy of extended availability, advantages of availability and two strain indicators. The authors conducted regression analyses to analyze the effects of extended availability on strain and the moderating role of perceived illegitimacy and advantages of extended availability.,Extended availability and – beyond this effect – perceived illegitimacy of extended availability were positively correlated with strain, whereas perceived advantages showed the opposite effect. Furthermore, perceived advantages had a moderating effect in that high advantages buffered the detrimental effects of extended availability.,The results are based on cross-sectional data. However, the findings confirm previous research indicating that the detrimental effects of extended availability are dependent on specific boundary conditions. In this study, the authors provided evidence for the moderating effect of perceived advantages regarding extended availability.,The results provided indications to designing availability in a risk-reducing way by accounting for boundary conditions that may increase or decrease the detrimental effects.,By focusing on perceived illegitimacy and flexibility advantages as boundary conditions for the effects of extended availability, the study introduces two established concepts into the research on increasingly flexible work–home boundaries.

中文翻译：

---

永远可用–感知到的优势和合法性的作用

研究表明，非工作时间的工作量可能会损害健康。但是，关于这些影响，个体之间存在重大差异。提到“努力-奖赏-不平衡”模型和“自我承受压力”模型，本文的目的是调查感知的优势以及扩展可用性的不合法性在解释中的作用。共有310位参与者完成了在线问卷，该问卷测量了扩展可用性，扩展可用性的不合法性，可用性的优势以及两个应变指标。作者进行了回归分析，以分析可扩展可用性对菌株的影响以及感知的非法行为的调节作用以及可扩展可用性的优势。扩展可用性以及（除了这种影响之外）感知的扩展可用性的不合法性与压力呈正相关，而感知的优势则显示出相反的效果。此外，感知优势具有适度的效果，因为高优势可以缓冲扩展可用性的有害影响。结果基于横截面数据。但是，这些发现证实了先前的研究，表明扩展可用性的有害影响取决于特定的边界条件。在这项研究中，作者提供了感知优势对扩展可用性的调节作用的证据。结果为通过考虑可能增加或减少不利影响的边界条件，以降低风险的方式设计可用性提供了指示。