Let's add a twist to the ultimatum game there is $1000 to be split, but if the

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Question:

Let's add a twist to the ultimatum game there is $1000 to be split, but if the Responder rejects the offer, then he gets $200 and the Proposer gets $400 Assume that $001 is the smallest increment of money possible Using backward induction, which of the following, if true, will lead to the equilibrium

$201
$401
$1000
$1001