It is a false statement that the law of diminishing marginal utility predicts the consumption behavior of addicts quite well.
In economics, law of diminishing marginal utility states that the marginal utility from each additional unit often declines as consumption increases and that as the marginal utility decline into negative utility, it may also become entirely unfavorable to consume another unit of any product.
So, when the consequences may increase with each portion consumed, thus, an addict is likely to continue consuming. Therefore, the statement is a false statement.
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