At his foundation, Gates doesn't do Think Weeks anymore. He said there's no reason to, since he no longer has an all-consuming managerial job. "I have more ability now to spend unstructured time" with top scientists, academics, doctors, and educators. And he goes to "invention sessions" at Intellectual Ventures (IV), a private investment and invention laboratory for fields ranging from software to biotechnology. IV was started by Nathan Myhrvold, the polymathic former chief technology officer for Microsoft. Gates uses his sessions at IV for topics on global health and says they can end up functioning like a Think Week on, say, malaria. "Because I'll get maybe 800 pages of material, more sometimes. I'll have to set aside 272 days to read all that stuff to be ready," Gates said. In that sense, for Gates, the model of Think Weeks lives on.