Cost Effectiveness and Health Impact of Remediation of Highly Polluted Sites in the Developing World

Examines four locations where pollution has been causing health problems and where the pollutants have been or are about to be cleaned up with the institute's intervention

Isomorphisms of lattices of Bures-closed bimodules over Cartan MASAs

For i = 1; 2, let (Mi;Di) be pairs consisting of a Cartan MASA Di in a von Neumann algebra Mi, let atom(Di) be the set of atoms of Di, and let Si be the lattice of Bures-closed Di bimodules in Mi. We show that when Mi have separable preduals, there is a lattice isomorphism between S1 and S2 if and only if the sets f(Q1;Q2) 2 atom(Di) atom(Di) : Q1MiQ2 6= (0)g have the same cardinality. In particular, when Di is nonatomic, Si is isomorphic to the lattice of projections in L1([0; 1];m) where m is Lebesgue measure, regardless of the isomorphism classes of M1 and M2

Efficient Labor Force Participation with Search and Bargaining

A fixed wage is inefficient in a standard search model when workers endogenously separate from employment. We derive an efficient employment contract that involves agents paying a hiring fee (or bond) upon the formation of a match. We estimate the fixed wage and efficient contract assuming the hiring fee is unobservable, and find evidence to reject the efficient contract in favor of the fixed wage rule. A counterfactual experiment reveals the current level of labor force participation to be 9% below the efficient level, and a structural shift to the efficient contract improves welfare by nearly 4%.labor supply, unemployment, matching, efficiency wages

Last words on inequality and overdotting: a review of Stephen Hefling\u27s book

Fuller attempts to make definitve decisions about appropriate articulation and rhythmic interpretation in 17th and 18th century music

Cartan Triples

We introduce the class of Cartan triples as a generalization of the notion of a Cartan MASA in a von Neumann algebra. We obtain a one-to-one correspondence between Cartan triples and certain Clifford extensions of inverse semigroups. Moreover, there is a spectral theorem describing bimodules in terms of their support sets in the fundamental inverse semigroup and, as a corollary, an extension of Aoi's theorem to this setting. This context contains that of Fulman's generalization of Cartan MASAs and we discuss his generalization in an appendix.Comment: 37 page

Positrons and 511 keV radiation as tracers of recent binary neutron star mergers

Neutron-rich material ejected from neutron star-neutron star (NS-NS) and neutron star-black hole (NS-BH) binary mergers is heated by nuclear processes to temperatures of a few hundred keV, resulting in a population of electron-positron pairs. Some of the positrons escape from the outer layers of the ejecta. We show that the population of low-energy positrons produced by NS-NS and NS-BH mergers in the Milky Way can account for the observed 511-keV line from the Galactic center (GC). Moreover, we suggest how positrons and the associated 511-keV emission can be used as tracers of recent mergers. Recent discovery of 511 keV emission from the ultra-faint dwarf galaxy Reticulum II, consistent with a rare NS-NS merger event, provides a smoking-gun signature of our proposal.Comment: 5 pages + 2 page supplement, 4 figures; v3: minor modifications, published versio

CARTAN TRIPLES

We introduce the class of Cartan triples as a generalization of the notion of a Car- tan MASA in a von Neumann algebra. We obtain a one-to-one correspondence between Cartan triples and certain Clifford extensions of inverse semigroups. Moreover, there is a spectral theorem describing bimodules in terms of their support sets in the fundamental inverse semigroup and, as a corollary, an extension of Aoi’s theorem to this setting. This context contains that of Fulman’s generalization of Cartan MASAs and we discuss his generalization in an appendix

Rethinking business models as value creating systems

The generic notion of a business model is well understood by investors and business managers and implies a number of anticipations; chiefly that it is a replicable process that produces revenues and profits. At its heart is some replicable process, artefact or proposition around which the everyday practices are formed. There are a number of reasons why this conception is weak in the Creative Industries. We have identified that the rationale for ‘business models’ in the Creative Industries include providing an attractor for non goal oriented creative activity, for stabilising emergent properties from creative activities and for maintaining the stability of these by anticipating revenues