BACKGROUND/AIMS Arteriovenous fistulas (AVFs) appear to be clinically superior to catheters as vascular access for maintenance hemodialysis, but higher insertion costs and high disease burden and mortality obscure the issue of whether AVF placement before hemodialysis initiation represents a net cost savings. We aimed to investigate Medicare costs for patients beginning maintenance hemodialysis...

Understanding Black-White Wage Differentials, 1960-1990 Author(s): James J. Heckman, Thomas M. Lyons, Petra E. Todd Source: The American Economic Review, Vol. 90, No. 2, Papers and Proceedings of the One Hundred Twelfth Annual Meeting of the American Economic Association, (May, 2000), pp. 344 -349 Published by: American Economic Association Stable URL: http://www.jstor.org/stable/117248 Accesse...

This article introduces some of the most popular techniques of data integration, that allow the combination of information coming from various sources. The illustration focuses, in particular, on the Bayesian generalized Heckman methodology and on the data calibration methodology based on vines and nonparametric Bayesian networks.

Ventilator Associated Events Dooshanveer Nuckchady, MD; Michael G. Heckman, MS; Tara Creech, RN; Darlene Carey, RN; Robert Domnick; Walter Hellinger, MD; Infectious Disease, Mayo Clinic Jacksonville, Jacksonville, FL; Biostatistics, Mayo Clinic Florida, Jacksonville, FL; Infection Prevention and Control, Mayo Clinic Florida, Jacksonville, FL; Information Technology, Mayo Clinic Rochester, Jacks...

A survey is given about recent developments in special functions associated with root systems. The paper addresses a general mathematical audience and it does not assume earlier knowledge of either special functions or root systems. The emphasis is on multivariable orthogonal polynomials: the Heckman-Opdam Jacobi polynomials and Maconald’s q-analogues of these.

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 maximization (mlem) ...

This study examines the determinants of households’ decision to migrate from Burkina Faso to Cote d’Ivoire, a leading country in the Regional West African Union. The paper, unlike most of the previous works, uses a dataset constituted from a two-sided survey conducted in 2002 at the origin and the host country. Therefore, it enables to study two groups of migrants: the seasonal and the permanen...

In this paper, I analyze how the rise to power of the Muslim Brotherhood, marked by increased parliamentary power in late 2006 due to unprecedented success in the 2005 elections, impacts female labor force participation in districts in which Muslim Brotherhood candidates won compared to those in which they did not win. I use a difference in differences estimation strategy, using both district a...

In this paper, we consider estimation of a time-varying parameter model for a forwardlooking monetary policy rule, by employing ex-post data. A Heckman-type (1976) two-step procedure is employed in order to deal with endogeneity in the regressors. This allows us to econometrically take into account changing degrees of uncertainty associated with the Fed's forecasts of future in°ation and GDP ga...