The authors are grateful to all the participants who made this
study possible.We examined the role of self-efficacy, social support, optimism, and mental health in the prediction of happiness in the
elderly. Moderated mediation analyses confirmed a full mediation in which self-efficacy, through perceived mental health
and moderated by social support, predicts happiness moderated, in turn, by optimism. When an elder is self-efficacious,
his or her mental well-being seems more likely to be improved and translated into enhanced happiness when social
support and optimism are moderate to high. We provide preliminary results on the interplay of these psychosocial
resources in improving subjective well-being that may help in designing tailored interventions for promoting happiness
in late adulthood