Is there data to support the claim that more ageism occurs in this industry than others? I think it is probably true, but I'm wondering if there's any hard evid

Is there data to support the claim that more ageism occurs in this industry than others? I think it is probably true, but I'm wondering if there's any hard evidence. I suppose it's going to be pretty hard to get reliable data on this. We can get statistics on mean age vs other industries, but those numbers alone don't prove age discrimination.