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There are some types of nudges that have had measurable and durable societal benefits.

The primary one I'm aware of is making 401k a default, people are likely to stay enrolled and increase enrollment.

That's not even a nudge, you're not attempting to change anyone's behaviour (which is: do nothing) you're trying to take advantage of their default behaviour. Basically just putting the bin where people dump trash anyway isn't a "nudge".

Sure, I bring it up though because it's discussed in those behavioral psych books.

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