It's an undated post of a two year old blogspammy summary thing of a single study by an advocacy group. As HN submission quality goes, it's not very high so if

It's an undated post of a two year old blogspammy summary thing of a single study by an advocacy group. As HN submission quality goes, it's not very high so if you are interested in having the topic discussed, you probably need to find some more interesting material.