Hang on a minute. There is absolutely nothing in this research that measures the accuracy of this approach. A user saying "I was ghosted" is not, to my mind, proof of anything.
Job seekers almost never actually know if the job was real or not, so it's hard to see how Glassdoor reviews can ever provide the insight this work is looking for.
I do believe that "ghost" jobs exist, often for H1B purposes, but I don't think this work proves it.
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