This paper proves Li (2009) unawareness structure equivalent to the single-agent propositionally generated logic of awareness of Fagin and Halpern (1988). For any model of one type one can construct a model of the other type describing the same belief and awareness. Li starts from an agent...

I analyse a market with asymmetric information and interdependent values. Accessing the market is costly and stochastic, e.g. requires lobbying, licences, search or attention. For a range of parameter values, there is a unique equilibrium in which higher gains from trade reduce trading,...

I analyse a market with asymmetric information, interdependent values and trade frictions. The frictions can be reduced at a cost, e.g. by increasing attention, search, lobbying or computing power. For some parameters, there is a unique equilibrium in which an increase in the gains from trade...