I examine treatment effect heterogeneity within an experiment to inform external validity. The local average treatment effect (LATE) gives an average treatment effect for compliers. I bound and estimate average treatment effects for always takers and never takers by extending marginal treatment effect methods. I use these methods to separate selection from treatment effect heterogeneity, genera...

Large, low-density C-type asteroids are abundant in the main belt. The most prominent of these objects is the dwarf planet Ceres, which presents an advanced stage of evolution. Ceres is almost twice as large as Enceladus, and both objects contain more than 50% of water in volume [1]. Although asteroids cannot benefit from tidal heating like outer planet satellites, their proximity to the Sun pr...

Mailing Address: Dr. Yaniel Castro-Torres Luz Caballero #161 entre Hospital y Alejandro Oms, Parroquia, Santa Clara. Postal Code: 50200, Villa Clara – Cuba E-mail: [email protected]; [email protected] Ratio Between Maximum and Minimum P Wave Duration (MaxPWD/MinPWD Ratio): a New Electrocardiographic Predictor for Atrial Fibrillation in Patients with ST-Elevation Acute Myocardial Inf...

In this paper we present Clara, a new programming language for high performance distributed computing. Clara has been developed to embody in an efficient distributed computing environment the conceptual clarity of the actor model, an object-based framework for the design and implementation of open distributed systems. We describe our Clara compiler, paying special attention not only to the adop...

Cut-elimination is the most prominent form of proof transformation in logic. The elimination of cuts in formal proofs corresponds to the removal of intermediate statements (lemmas) in mathematical proofs. Cut-elimination can be applied to mine real mathematical proofs, i.e. for extracting explicit and algorithmic information. The system CERES (cut-elimination by resolution) is based on automate...

This paper attempt to explain for the repeated empirical finding that homeowners have shorter unemployment durations than tenants. On the basis of Oswald’s hypothesis, however, researchers would expect to find longer unemployment durations for homeowners. But the search models that have been proposed to motivate this thesis have difficulties in providing an explanation for the reverse effect. T...