According to the article "Modeling Ambiguity in Decisions Under Uncertainty", the ___________________ illustrates that subjects often prefer to be on the event that a red (or black) ball will be drawn from an urn containing 50 red and 50 black balls than on the same event if the ball would be drawn from an urn containing an unknown proportion of red and black balls. Group of answer choices Tversky Model Ellsberg Paradox Larson Puzzle Hogarth Enigma None of the above