Sociopsychological impact factors of depression patients during the COVID-19 epidemic period

Objective:To investigate the impact factors of the COVID-19 epidemic on the mental health of patients with depression.Methods:The relevant data of 242 residents aged 18-50 years in a certain area were collected,118 patients and 124 healthy people were analyzed by general information questionnaire,the PsychoSocial Index(PSI)questionnaire,Social Support Rating Scale(SSRS)and Symptom Checklist 90(SCL-90).Compare the differences in social and psychological factors between the two groups.Then use logistic regression to evaluate the social and psychological influencing factors of depression patients during the epidemic.Results:Two results of logistic regression analysis showed that marital status,occupational status,abnormal pathological behavior,and utilization of support were still significantly associated with depression.Compared to working,unemployed/unemployed/retired,students are closely related to depression,followed by abnormal pathological behavior and utilization of support.Conclusion:Under the epidemic,depression groups lacking social relationships should actively pay attention to their mental health status and comprehensively enhance their social and psychological support.To avoid the exacerbation of psychological and psychological symptoms caused by the epidemic.

Modified Ramsey Rule, Optimal Carbon Tax and Economic Growth

In contrast to the overlapping-generations model, it is allowable to discount the future utility in a dynasty model without the ethical difficulty related to intergenerational conflicts. Much precedent research uses Ramsey-type optimal growth theory in order to estimate the social discount rate. However, one must note that almost all the formulations neglect the existence of negative intertemporal externalities. This problem is vital when one analyzes the global warming problem mainly caused by the excess concentration of carbon dioxide (CO2). This is because an adjoining effect of capital accumulation exists besides the improvement of product capacity, which is reflected in the rate of interest (or equivalently, the marginal productivity of capital). That is, one cannot neglect a negative externality to the future productivity that originates from the excess emissions of CO2. Accordingly, following the optimal growth theory, the effective social discount rate should be heightened by a proportional carbon tax to suppress future excess consumption/ emissions than in the case of the existing analyses, which exclude such an intertemporal external diseconomy.

Modified Ramsey Rule and Optimal Carbon Tax

The Ramsey rule is regarded as a convenient vehicle for estimating the social discount rate in general. Carbon pricing is treated as another theory of environmental economics. This study clarifies the theoretical relationship between the Ramsey rule and optimal carbon price, which has been overlooked in the existing research. It succeeds in deriving the optimal carbon price from the modified Ramsey rule in stationary state. Since the Ramsey rule decides the dynamics of an economy and a stationary state is its destination, by using the optimization condition of individual who are assumed to live infinitesimally short life, we can solve the optimal carbon price at stationary state.