The standard state-spaces of asymmetric information preclude non-trivial forms of unawareness (Modica and Rustichini …-trivial unawareness among several individuals, and which satisfies strong properties of knowledge as well as all the desiderata on … unawareness proposed this far in the literature. …

Heifetz, Meier and Schipper (2005) introduced a generalized state-space model that allows for non-trivial unawareness … among several individuals and strong properties of knowledge. We show that this generalized state-space model arises …

relations modeling implicit knowledge. They are a flexible model of unawareness, and best interpreted from a outside modeler …'s perspective. Unawareness structures by Heifetz, Meier, and Schipper (2006, 2008) (HMS) model awareness by a lattice of state … spaces and explicit knowledge via possibility correspondences. Sublattices thereof can be interpreted as subjective views of …

We prove a \no-speculative-trade" theorem under unawareness for the infinite case. This generalizes the result for the …

We generalize the ``No-speculative-trade" theorem for finite unawareness belief structures in Heifetz, Meier, and …