[Air-L] Maybe Off-topic: Ageism and Media

Hello, This may be a bit off-topic, but I was wondering if anyone on this list knows of an expert/researcher who's looked at ageism in the media, more specifically negative stereotypes of older people in media representations, including countries other than the US. If so, could you please forward some names to me? I am looking for a speaker to propose for a US event in New York. Thanks, Nelida