In studies of subjective well-being, economists and other researchers typically use a fixed or random effect estimation to control for unobservable heterogeneity across individuals. Such individual heterogeneity, although substantially reducing the estimated effect of many characteristics, is little understood. This paper shows that personality measures can account for 20% of this heterogeneity...

anxiety is one of the prevalent mental health disorders. stressors by changes in physiology can increase risk of physical diseases. high levels of cortisol have many negative effects on health. this study aimed to determine anxiety symptoms prevalence and its relationships with plasma cortisol level. this study was a descriptive- analytical cross-sectional that was conducted on 100 nursing stud...