This paper presents an investigation on the effects of various components of justice including distributive justice, interactional justice and procedural justice on building a mutual trust among customers in insurance firms. The proposed study of this paper uses a questionnaire originally developed by Daniels [Daniels, N. (1996). Justice and justification: Reflective equilibrium in theory and practice (Vol. 22). Cambridge: Cambridge University Press.] and designs a questionnaire for measuring trust. The study was performed among 384 people who had used insurance services in city of Tehran, Iran. Cronbach alphas for two questionnaires of justice and trust are 0.799 and 0.935, respectively, which are well above the minimum acceptable level. Using Spearman correlation test, the study has detected that two justice components, interactional justice and procedural justice, positively influence on customers’ trust, significantly.

This paper presents a study to measure the effect of personal characteristics including neuroticism, extraversion, openness to experience, conscientiousness and agreeableness on word of mouth advertisement. The population of this survey includes all people who use mobile phone in city of Tehran, Iran. The study designs a questionnaire in Likert scape and distributes it among 400 randomly selected people who use mobile devices. Using Spearman correlation test, the study confirms the positive of effects of neuroticism, extraversion, openness to experience on word of mouth advertisement and the negative impact of agreeableness on word of mouth advertisement. However, the study does not find any meaningful relationship between conscientiousness and word of mouth advertisement.