This paper presents a continuous?time model of sovereign debt. In it, relatively impatient government's hidden type switches back and forth between commitment type, which cannot default, an opportunistic can, where we assume outside lenders have particular beliefs regarding how should borrow for any given level debt bond price. Markov equilibrium, the mimics when borrowing, revealing its only b...

To mitigate climate change, food systems must reduce their greenhouse gas emissions. For consumers, this means switching to more plant-based diets and wasting less food. A behaviorally informed policy employing nudges—educative architectural—can be a cornerstone. Plant-based defaults promise large reduction effects while maintaining freedom of choice.

Default logic (DL) (Reiter 1980) is one of the most prominent approaches to nonmonotonic reasoning. One of the main problems with its applicability is that it is computationally harder than classical logic (Gottlob 1992). (Cholewinski 1994,1995) introduced and studied stratification of default theories to increase the efficiency of default reasoning. The idea is to to split the knowledge into s...