# Prospect theory

Decision theory in economics, psychology, philosophy, mathematics, and statistics is concerned with identifying the values, uncertainties and other issues relevant in a given decision, its rationality, and the resulting optimal decision. It is closely related to the field of game theory as to interactions of agents with at least partially conflicting interests whose decisions affect each other.

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String Theory is an active research framework in particle physics that attempts to reconcile quantum mechanics and general relativity. It is a contender for a theory of everything (TOE), a self-contained mathematical model that describes all fundamental forces and forms of matter. String theory posits that the elementary particles (i.e., electrons and quarks) within an atom are not 0-dimensional objects, but rather 1-dimensional oscillating lines ("strings").

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In theory, Apple, Google (GOOG, +0.10%), or Amazon might be interested in adding 80 million or so monthly users, on the assumption that they could convince at least some of them to upgrade to a paid account. Or they could just wait for Pandora to go under, and bank on the prospect of picking up some of its users eventually anyway, without having to pay anything at all.