The current study explores the relationship between personality traits and self-presentation at Facebook. An online survey of Facebook users was conducted. The results suggest that extraversion was positively related to self-presentation both on Wall and at News Feed. Extraverts uploaded photos and updated status more frequently, and had more friends displayed on Wall than introverts. Besides, ...

We extend back to 1890 the volatility implied by options index (VIX), available only since 1986, using the frequency of words on the front-page of the Wall Street Journal. News implied volatility (NVIX) captures well the disaster concerns of the average investor over this longer history. NVIX is particularly high during stock market crashes, times of policy-related uncertainty, world wars and f...

Valuable models for immortal solutions of Ricci ‡ow that collapse with bounded curvature come from locally G-invariant solutions on bundles GN ,! M !Bn, with G a nilpotent Lie group. In this paper, we establish convergence and asymptotic stability, modulo smooth …nite-dimensional center manifolds, of certain RN -invariant model solutions. In case N + n = 3, our results are relevant to work of ...