I am trying to collect stats on posts published to a Facebook Page. Right now I am able to track the number of comments and likes on a post easily, but shares are eluding me, and I'm wondering if it's even possible yet.
I have checked both the Graph API and the FQL tables and have not been able to find an obvious solution. The graph endpoint "/[PAGE_ID]/feed", as well as the endpoint for a post itself shows comments and likes quite plainly, but nothing about shares. Furthermore, the (undocumented?) endpoint "/[PAGE_ID]_[POST_ID]/insights" provides some fairly mysterious data about post "clicks", but nothing about shares. Finally, the FQL "stream" table again plainly provides data about comments and likes, but not about shares.
It's quite a conspicuous piece of data to be missing, as the share counts for a Page's posts would make for a really interesting, useful metric in third-party social media management software...