In EU, if you put an item on sale, you have to post the lowest price in the last 30 days to see if it's an actual sale or not (even though i'd consider 30 days a too short interval).
Why not have a similar regulation for job postings? Require companies to publish all the job posting history for the last few years, all the positions advertised and the number of people hired for those positions.
Prospective workers would see an ad, look at the history, see that the same position has been open for 3 years now with zero people hired and skip that company. Also companies would actually post their job ads only when they actually intend to hire someone.
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