Born losers?

Are there any studies concerning whether certain people are lucky and others not? How much of a factor is luck in the playing of poker? How much of a factor is the right state of mind? How long can a bad streak last? Could one last say 2000 hours of playing?

[Xhad]

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Are there any studies concerning whether certain people are lucky and others not?

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No, because luck is superstition, and any "studies" to this effect would be about as scientific as astrology.

EDIT: For a bit of illustration as to why this must be so: There is no reason why an unintelligent, natural force would know the difference between a "good" outcome and a "bad" outcome in a game because these things are arbitrary decisions based on the rule that PEOPLE set for the game. In fact, in some games the cards are dealt similarly but the conditions for winning are different (i.e. 7-stud hi vs. Razz). So only an intelligent force could possibly assign good luck vs. bad luck, meaning believing you are unlucky is the equivalent of saying that God wants you to lose. Therefore luck as a tangible quantity is not a scientific claim, so stop worrying about it already.