This study contributes to the debate on accessibility of higher education in Chile, with a special focus geospatial dimension access university studies. paper addresses central question whether geography (physical distance and neighborhood effects) plays significant role determining students Chile. We use Heckman probit-type (Heckit) models adjust for selection during application education—that...

Several studies claimed that there is underinvestment in education. Judd (2000) combines Capital Asset Pricing Model (CAPM) techniques with the indivisibility of human capital to compare the return to four-year college graduation with assets of similar risk to find an excess of return to the college investment option. Heckman, Lochner, and Todd (2008) evaluate the internal rate of return of the...

  Objective(s): In SPECT, the sinogram contains scatter and lack of attenuated counts that degrade the reconstructed image quality and quantity. Many techniques for attenuation and scatter correction have been proposed. An acceptable method of correction is to incorporate effects into an iterative statistical reconstruction. Here, we propose new Maximum Likelihood Expectation Maximiz...

Economists have begun to embrace the notion, already accepted by the market, that GEDs and High School Diplomas signal similar cognitive abilities, but different non-cognitive abilities. To better understand this phenomenon and its implications, this paper presents a study of an education environment, prison, which provides natural controls for non-cognitive abilities. The study reveals similar...

Abstract In this paper, we generalize a result of Cuttler, Greene, Skandera, and Sra that characterizes the majorization order on Young diagrams in terms nonnegative specializations Schur polynomials. More precisely, introduce generalized notion associated to an arbitrary crystallographic root system $\Phi $ show it admits natural characterization values spherical functions any Riemannian symme...