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This study aims to investigate the relationship between return and liquidity risk and the impact of the prospect theory value (PTV) as a moderator variable on this relationship.

The statistical population of this study is the companies listed on the Tehran Stock Exchange during the years 2006–2019. In this research, the portfolio construction method and alpha analysis of the factor models and the cross-sectional regression of Fama and Macbeth have been used to analyze the data.

The results obtained through the portfolio construction method and the cross-sectional regression of Fama and Macbeth show that there is no significant relationship between return and Amihud (2002) criterion (ILLIQ) as liquidity risk. The PTV also does not affect this relationship, but there is a positive and significant relationship between returns and the turnover ratio (TOR) as liquidity risk. In other words, the lower the TOR (higher liquidity risk), the lower the return. On the other hand, the results showed that the PTV affects this relationship.

To the best of the authors’ knowledge, this study is the first to examine the effect of the PTV on the relationship between return and liquidity risk. It is expected that the results of this study can help investors explain returns better through a deeper understanding of the behavior of investors and their decision-making methods. In other words, by examining the PTV as a proxy for behavioral dimension, we can understand that the relationship between return and liquidity risk can be affected by other dimensions like PTV, so when evaluating risk and return, other influential factors should also be considered.

Mental health is one of the most important factors for evaluating the health of different age groups in the community. The most common forms of mental health disorders are depression and anxiety. Health status of students as an important age group has positive consequences in the community. To provide special recommendations for preventing mental disorders, the purpose of this paper is to determine the correlations among the individualism and family orientation and mental health.

A meta-analysis was conducted to find scores of mental health. International databases of Scopus and PubMed as well as Iranian databases of IranMedex and SID were systematically searched in September 2014 for studies conducted on Iranian students. Of 379 reviewed studies, 58 were selected for meta-analysis. A meta-regression model was estimated to show the effects of individualism and family orientation on mental health.

Eight studies were conducted in Tehran. Eight studies were published in English. In nine studies, school students, and in one study both school and university students were surveyed. General Health Questionnaire-28 score varied from 13.77 in Arak to 47.78 in Tehran. The results of this study showed that the pooled mental health score for Iranian students was 23.725, indicating that Iranian students had poor mental health. In meta-regression, the coefficient of family orientation was −0.2893 and it was significant. Other variables did not have any significant relationship with mental health scores.

Improvement of living conditions and enabling the youth to positively communicate with different social groups are recommended.