Sponsored search advertising has grown rapidly since the last decade and is now a significant revenue source for search engines. To ameliorate revenues, search engines often set fixed or variable reserve price to in influence advertisers’ bidding. This paper studies and compares two pricing...

We study inventory management for a blood center that periodically collects whole blood and processes it into multiple blood products such as red blood cells and platelets. The blood center may also be able to collect a single blood product by apheresis. With limited lifetimes, blood products...