Using modern portfolio theory, investors can build portfolios that maximize return for a given level of risk or minimize risk for a desired level of return. Since its introduction by Henry ...

Social comparison theory is the idea that individuals determine their own social and personal worth based on how they stack up against others. The theory was developed in 1954 by psychologist Leon ...

More specifically, this study concentrates on examining three progressive objectives: (1) classifying Weibo users’ sentiment regarding CCRCs based on Ekman’s theory of emotions (positive, neutral, ...