AA stands for Attention Allocation not Alcoholic Anonymous. Sorry for the deceiving eye catcher. PTT presentation is work I did in 2005 in the purely abstract edges of Operation Research. I uploaded a PPT presentation. The presentation is lighter and more colorful than the actual article. Warning you have to be a bit of a geek to press the link above. For the super geeks I put a link to the full article. It’s called “Attention Allocation to Partially Observable Heterogeneous Customers – with Imperfect Treatment”, Catchy? Full AA Problem article