Mental health status and associated contributing factors among the Hakka elderly in Fujian, China

PurposeLittle is known about the mental health of the Hakka elderly. This study explores the status of, and factors associated with mental health among Hakka elderly populations from Fujian, China.MethodsThis is a cross-sectional, community-based survey study containing a total of 1,262 valid samples. The Chinese version Symptom Checklist-90-R (SCL-90-R) was used to assess the mental health status of the Hakka elderly. We used t-tests to compare the differences for 10 dimensions of SCL-90-R scores between the Chinese national norm and the Hakka elderly. Univariate and multivariate analysis were performed by using linear regression analysis to identify the main socio-demographic factors that were most predictive of the total score of SCL-90-R in the Hakka elderly.ResultsThe scores of somatization (1.78 ± 0.55 vs. 1.40 ± 0.46, P < 0.001) and phobic anxiety (1.21 ± 0.36 vs. 1.17 ± 0.31, P < 0.001) for the Hakka elderly in Fujian appeared to be significantly higher than the Chinese norm. The higher total scores of SCL-90-R were found among females (β = 0.030, P = 0.044), widowed persons (β = 0.053, P = 0.021), those with parent(s) alive (β = 0.047, P = 0.019), and those with poorer self-rated health status (β = 0.110, P < 0.001). The lower total scores of SCL-90-R were found among those who were currently living in town, those with lower education level, those with higher average annual household incomes, and those who were living with spouse or children.ConclusionThe worse mental health conditions of the Hakka elderly in somatization and phobic anxiety were detected. The overall mental health status was shown to be worse among females, widowed persons, those who were living in village, those with lower education, and those with father or/and mother alive

When and how is team cognitive diversity beneficial? An examination of Chaxu climate

The workforce is becoming increasingly heterogeneous in terms of age, gender, race/ethnicity, education, values, cognition, and culture. Thus, team diversity management is regarded as an important development strategy that organizations can use to gain advantages. However, in the diversity literature, empirical studies investigating the effects of cognitive diversity on creativity have not yielded conclusive findings. This has called into question the importance of team cognitive diversity. To address this, we investigate when and how team cognitive diversity fosters individual creativity. Drawing on the categorization-elaboration model (CEM) and literature on Chaxu climate, we develop a multilevel mediated moderation model in which the team Chaxu climate is treated as the moderator and team knowledge sharing is treated as the mediator. Using two-wave paired data collected from 46 teams and 368 members, we find that Chaxu climate mitigates the positive effect of team cognitive diversity on team knowledge sharing. In turn, team knowledge sharing mediates the interaction effect between team cognitive diversity and Chaxu climate on individual creativity. Our study facilitates a shift from an automatic-oriented lens to a contingent-oriented lens by identifying a new contingent factor and advances research on the underlying mechanisms by identifying a new process factor. Ultimately, this study enriches our knowledge on the function of cognitive diversity in the field of business strategy

Two essays on market behavior

textMy dissertation consists of two essays which investigate how the reaction of market participants to aggregate and firm-specific information affects asset prices and firms’ corporate choices. The first essay studies the implications of investor sentiment for asset prices. It develops a novel stock-by-stock measure of investor sentiment which I call sentiment beta. Using this measure I test several hypotheses. First hypothesis postulates that sentiment affects stocks of some firms more than others due to differences in firm characteristics. Second hypothesis predicts that more sentiment sensitive stocks are more likely to be held by individual investors. Consistent with the first hypothesis, I find that more sentiment-sensitive stocks are smaller, younger, have greater short-sales constraints, idiosyncratic volatility and lower dividend yields. Given size and volatility, high sentiment beta stocks have greater analyst coverage and institutional ownership, higher likelihood of S&P500 membership, higher turnover and lower book-to-market ratios. Stocks that are more exposed to sentiment changes deliver lower future returns, which is inconsistent with the risk factor interpretation of investor sentiment. Institutional analysis reveals that institutions stayed away from sentiment-sensitive stocks in the 1980’s, but held more of these stocks since the early 1990’s. The second essay tests a catering hypothesis which predicts that firm managers concerned about the current stock price will deviate from the optimal policy in setting profitability and revenue growth targets due to the incentives to cater to the time-varying relative investor demand for firms with different composition between revenue growth and profit margins. I develop a measure which I call a revenue growth premium and document three results consistent with catering interpretation: 1) time periods when the premium is high tend to be followed by “higher-than-expected” sales and investment growth, advertising, acquisitions and R&D; 2) catering to the premium is more pronounced among firms where managers care more about the short-term stock price; 3) consistent with “bounded rationality” version of catering story, trading strategy based on longing stocks of firms with high margin surprises and shorting firms with low margin surprises when the premium is high yields 40/bp per month after adjusting for risk and post-earnings announcement drift.Financ

Salidroside Supplementation Affects In Vitro Maturation and Preimplantation Embryonic Development by Promoting Meiotic Resumption

Salidroside (Sal) possesses several pharmacological activities, such as antiaging, and anti-inflammatory, antioxidant, anticancer activities, and proliferation-promoting activities, but the effects of Sal on oocytes have rarely been reported. In the present study, we evaluated the beneficial effects of Sal, which is mainly found in the roots of Rhodiola. Porcine cumulus oocyte complexes were cultured in IVM medium supplemented (with 250 μmol/L) with Sal or not supplemented with Sal. The maturation rate in the Sal group increased from 88.34 ± 4.32% to 94.12 ± 2.29%, and the blastocyst rate in the Sal group increased from 30.35 ± 3.20% to 52.14 ± 7.32% compared with that in the control group. The experimental groups showed significant improvements in the cumulus expansion area. Sal reduced oocyte levels of reactive oxygen species (ROS) and enhanced intracellular GSH levels. Sal supplementation enhanced the mitochondrial membrane potential (MMP), ATP level, and mtDNA copy number, which shows that Sal enhances the cytoplasmic maturation of oocytes. Oocytes in the Sal group exhibited slowed apoptosis and reduced DNA breakage. Cell cycle signals and oocyte meiosis play important roles in oocyte maturation. The mRNA expressions of the MAPK pathway and MAPK phosphorylation increased significantly in the Sal group. The mRNA expression of the oocyte meiosis gene also increased significantly. These results show that Sal enhances the nuclear maturation of oocytes. Moreover, Sal increased the number of blastocyst cells, the proliferation of blastocysts, and the expressions of pluripotency genes. Sal down-regulated apoptosis-related genes and the apoptotic cell rate of blastocysts. In summary, our results demonstrate that Sal is helpful to improving the quality of porcine oocytes in vitro, and their subsequent embryonic development