Alors que jusqu'à présent les recherches sur la RSE se sont principalement situées à un niveau macroéconomique, s'intéresser aux conséquences de ces politiques sur les employés (la micro RSE) représente une approche novatrice (Rupp et al., 2006). En effet, les employés sont le noyau fonctionnel dans la réussite de la politique de RSE. Ils sont susceptibles d'évaluer et de réagir aux activités de RSE. Pour cela, la RSE peut être envisagée sous l'angle des théories de la justice organisationnelle (Rupp, 2011) afin d’explorer la nature de ces évaluations et de ces réactions. Plus particulièrement, grâce aux recherches sur la justice envers des tiers (DeCremer et van Hiel, 2006, Skarlicki et Kulik, 2005), il est possible d'étudier les perceptions des employés de la politique de leur entreprise envers les parties prenantes externes. Les employés peuvent ainsi juger la justice distributive, procédurale et interactionnelle de leur entreprise (Colquitt et al., 2001).L'objet de cette thèse est précisément d'étudier les conséquences des perceptions de justice envers les parties prenantes externes sur les attitudes et comportements des employés, notamment l'engagement organisationnel. Il est également important de comprendre les mécanismes sous-jacents qui lient perception de justice des employés et leurs réactions attitudinales et comportementales car chaque employé est unique dans ses propres réactions psychologiques. Nous proposons ainsi d’intégrer la justice déontique avec d’autres mécanismes psychologiques en médiation ou en modération pour mieux expliquer l’engagement organisationnel. / While research on CSR has so far been largely developed at the macro level, looking at the impact of these policies on employees (individual level of analysis or micro CSR) is an innovative approach (Rupp et al., 2006). Indeed, the employees are the functional core in the success of the CSR policy. They are more likely to evaluate and react to CSR activities. CSR can be considered from the perspective of organizational justice theories (Rupp, 2011). In particular, through third-party justice research (DeCremer and van Hiel, 2006, Skarlicki and Kulik, 2005), it is possible to examine employees' perceptions of their organization's policy towards external stakeholders. Employees can judge the distributive, procedural and interactional justice of their organization (Colquitt et al., 2001).The purpose of this thesis is precisely to study the consequences of justice perceptions towards external stakeholders on employee attitudes and behaviors, including organizational commitment. It is also important to understand the mechanisms that link employees' perception of justice with their attitudinal and behavioral responses because each employee is unique in his own psychological reactions. We propose to integrate the deontic justice with other psychological mechanisms in mediation or moderation to better explain organizational commitment.

Well-being at work is of major public interest, and justice at the workplace can be a key factor contributing to employees and managers feeling well. Research has found direct relationships between organizational justice perceptions and work and health outcomes. With research on the justice–health link still emerging, this thesis examines the moderating and mediating processes for the effects of justice perceptions on work outcomes and especially health outcomes. As little is known about those who enact justice, the antecedents and consequences of justice enactment are also studied. In Study I, the relationships between organizational justice and work and health outcomes were in focus, as the moderating role of job characteristics was investigated utilizing the demand–control(–support) model. Organizational justice and job characteristics were associated with work and health outcomes within and across time. The multiplicative effects showed that the organizational justice effects were stronger when perceived job demands were high, job control was low or social support was low. Study II examined the processes through which justice perceptions translate into health outcomes. Building on the allostatic load model, mental preoccupation with work was found to be a relevant mediator of the justice–health relationship, with locus of control moderating the mediated relationships. Study III focused on the actor perspective. Investigating predictions based on the deontic model of justice and ego-depletion theory, moral regard and justice self-efficacy predicted justice enactment positively, and justice enactment had positive effects on feeling professionally recognized but also negative health consequences for the actors themselves. This thesis contributes to advancing the emergent justice–health research stream by providing insights into the processes underlying these aspects, and by incorporating this stream into the actor perspective. / <p>At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 3: Submitted.</p>