Interestingly I wrote an answer on Quora that describes a game-theoretic analogy to asset price bubbles: http://www.quora.com/Is-there-a-(game-theory)-game-whic

Interestingly I wrote an answer on Quora that describes a game-theoretic analogy to asset price bubbles: http://www.quora.com/Is-there-a-(game-theory)-game-which-captures-the-core-dilemma-of-an-economic-bubble/answer/Jinghao-Yan http://www.quora.com/Is-there-a-(game-theory)-game-which-cap... While I'm not sure if LinkedIn's price is a sign of a bubble, even if it were a bubble price appreciation can be sustained by the forces described in the answer above. The only question is for how long.