In this paper, ‎we propose new residuals for gamma regression models, ‎assuming that both mean and shape parameters follow regression structures. The  models are summarized and fitted by applying both classic and Bayesian methods as proposed by Cepeda-Cuervo (2001). The residuals are proposed from properties of the biparametric exponential family of distributions. ‎Simulated an...

Several fastidious lactic acid bacteria require a new growth factor, originally termed the Lactobacillus bulgartcu8 factor (LBF), for growth on synthetic media (Williams, Hoff-Jorgensen, and Snell, 1949; Kitay and Snell, 1950). Highly purified concentrates of this factor contained bound pantothenic acid, a finding that led to the discovery that LBF was apparently identical with the fragment of ...

Rogosa, Tittsler, and Geib (1947) reported that many strains of Lactobacilluss bulgaricus, Lactobacillus lactis, Lactobacillus acidophtlus, Lactobacillus delbrueckii, and Lactobacillus leichmannii failed to grow in semisynthetic media similar to those used for vitamin assay with other lactic acid bacteria, even though all of the then known B vitamins were added. Since that time oleic acid (Will...

INTRODUCTION Renal allograft half-life time (t½) is the most straightforward representation of long-term graft survival. Since some statistical models overestimate this parameter, we compare different approaches to evaluate t½. PATIENTS AND METHODS Patients with a 1-year functioning graft transplanted in Spain during 1990, 1994, 1998 and 2002 were included. Exponential, Weibull, gamma, lognor...

B-vitamin assays with chicks. 2 89 Roberts, E. C. & Snell, E. E. (1946). J. bid. Chem. 163, 499. Rosen, F., Huff, J. W. & Perlzweig, W. A. (1946). J. bid. Chem. 163, 343. Snell, E. E. & Rannefeld, A. N. (1945). J. bid. Chem. 157, 475. Sreenivasan, A., Harper, A. E. & Elvehjem, C. A. (1949). J. bid. Chem. 177, 117. Stokstad, E. L. R., Jukes, T. H., Pierce, J. . Page, A. C. & Franklin, A. L. (194...

We analyze the robustness properties of the Snell envelope backward evolution equation for the discrete time optimal stopping problem. We consider a series of approximation schemes, including cut-off type approximations, Euler discretization schemes, interpolation models, quantization tree models, and the Stochastic Mesh method of Broadie-Glasserman. In each situation, we provide non asymptotic...

The aim of this study is to determine the relationship between GDP and inflation domestic
 loans given by banks private sector using time series models. In study, in which the
 1972-2020 annual data for Turkiye were used, Harvey et al. (2008) Leybourne (2007)
 linearity tests, traditional unit root tests linearly determined Kapetanios, Shin Snell
 (2003) (KSS) nonlinear perf...

We present a new algorithm to compute the Snell envelope in the specific case where the criteria to optimize is associated with a small probability or a rare event. This new approach combines the Stochastic Mesh approach of Broadie and Glasserman with a particle approximation scheme based on a specific change of measure designed to concentrate the computational effort in regions pointed out by ...