How should an impartial social observer judge distributions of well-being across different individuals when there is uncertainty regarding the state world? I explore this question by imposing very weak conditions rationality and benevolent sympathy on betterness judgments under uncertainty. Although enough to be consistent with all main theories rationality, these prove sufficient rule out any ...

Research Summary This study examines the independent and joint effect of ambiguity perceived certainty apprehension on law-breaking decision-making. Data come from a survey experienced drivers (N = 1147) who viewed videos depicting car speeding an interstate highway under experimentally manipulated circumstances. The sampled were generally averse, opting to reduce as about increased. However, i...

We consider here some special forms of ambiguity for pure context-free grammars, namely pattern avoiding ambiguity, pattern preserving ambiguity, pattern ambiguity, and grammar avoiding ambiguity. The rst two properties are undecidable for arbitrary pure context-free grammars, and in a particular but general enough case we can eeectively decide whether or not a pure context-free grammar is patt...