The Coxeter groups that act geometrically on euclidean space have long been classified and presentations for the irreducible ones are encoded in the well-known extended Dynkin diagrams. The corresponding Artin groups are called euclidean Artin groups and, despite what one might naively expect, most of them have remained fundamentally mysterious for more than forty years. Recently, my coauthors ...

It is well-known that small di¤erences in discount rates, persisting over generations, make it much easier to explain US wealth inequality across households as an equilibrium outcome. At the individual level, recent micro studies suggest that variations in preferences or in planning behavior are plausible candidates to explain inequality in pre-retirement savings among households in similar cir...

It is well-known that small differences in discount rates, persisting over generations, make it much easier to explain US wealth inequality across households as an equilibrium outcome. At the individual level, recent micro studies suggest that variations in preferences or in planning behaviour are plausible candidates to explain inequality in pre-retirement savings among households in similar c...

An infeasible start predictor-corrector algorithm for semideenite programming is proposed. It is a direct extension of the Mizuno-Todd-Ye predictor-corrector algorithm for linear programming. The algorithm uses the

1976). Understanding these prototypical patterns for Process tracing methods, particularly those based evaluating information helps identify behavior that on information acquisition, are becoming commoncould constrain or alter decision processes. Second, the place. Because of this, it is important to examine both information acquisition patterns directly influence cogthe reactivity and the vali...

Corpus linguistics has developed, over the past three decades, into a rich paradigm that addresses a great variety of linguistic issues ranging from monolingual research of one language to contrastive and translation studies involving many different languages. Today, while the construction and exploitation of English language corpora still dominate the field of corpus linguistics, corpora of ot...

For right-angled Coxeter groups WΓ, we obtain a condition on Γ that is necessary and sufficient to ensure that WΓ is thick and thus not relatively hyperbolic. We show that Coxeter groups which are not thick all admit canonical minimal relatively hyperbolic structures; further, we show that in such a structure, the peripheral subgroups are both parabolic (in the Coxeter group-theoretic sense) an...

Opioid abuse is currently the most significant public health problem in the US. Many US states implemented prescription drug monitoring programs (PDMPs) in response. In this paper, I use a new micro-level medical claims database and I exploit state-level and time-series variations in PDMP implementation to shed light on the impacts of these programs. My results show that PDMPs lead to an overal...

Firms systematically lobby the U.S. Congress to in uence policy-making. To what extent do lobbying expenditures a ect the probability that a policy is enacted? What are the private returns from lobbying expenditures? To answer these questions, I construct a novel dataset comprised of federal energy legislation and lobbying activities by the energy sector during the 110th Congress (2007 2008). A...