I want to get info on trends to predict future behavior. What type of information makes teenagers and college students more susceptible to suicide? Could we p

I want to get info on trends to predict future behavior. What type of information makes teenagers and college students more susceptible to suicide? Could we predict that with complete social networking information? Can we determine a person's cognitive capabilities by their trends and actions? Can we predict future trends in markets and purchasing habits via a complete social network? THAT is what I want to know.