Robert A. Ritzel
Mar 1, 2006; 29:717-718
BR Pathophysiology/Complications

Two additional Delta Dental member companies announced details April 27-28 of programs that will provide economic assistance and post-COVID-19 pandemic relief for members of its independent provider networks across 16 states and the District of Columbia.

An MPI Leadership Visions discussion with the Foreign Minister of Mexico, Claudia Ruiz-Massieu, for her first public appearance in Washington, DC. 

When President-elect Barack Obama, an early opponent of the Iraq war, asked Sen. Hillary Rodham Clinton -- who helped to authorize the war -- to be his secretary of state, many liberals scratched their heads.

Massachusetts' new performance assessment for teacher candidates helps boost readiness.

Research findings on the implementation of a new teacher candidate performance assessment in Massachusetts inform the development of additional supports for educator preparation programs.

Relying on newly available data under ESSA, a local advocacy group found several districts that spend more money on wealthy students than poor students, despite the state's intentions.

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

The state, which earned a B-plus, led the nation in K-12 achievement rankings and outperformed other states in several key academic indicators, but fell short on funding equity.

The state's "Influence 100" project includes a leadership development program that will give aspiring district leaders a hands-on opportunity to work through an equity issue in their home districts.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

Massachusetts is the fifth state to join the Innovative Assessment Demonstration Authority created through the Every Student Succeeds Act, which allows states to experiment with new forms of testing.

School buildings in Massachusetts will remain closed through the end of the academic year, but remote learning will continue, Gov. Charlie Baker announced Tuesday.

Fleming, John Henry, died 1894.

Fascism -- History -- 21st century.

Berlin : Hirschwald, 1894.

Wien : W. Braumuller, 1887.

Hamburg : L. Voss, 1883.

Berlin : E. Grosser, 1877.

Wien : Toeplitz & Deuticke, 1886.

Leipzig : F. Deuticke, 1890.

Bingen am Rhein : Selbstverlag des Verfassers, 1885.

Boston : Nathan Hale, 1835.

London : Rebman, 1901.

Paris : G. Steinheil, 1895.

Paris : Asselin et Houzeau, 1899.

London : J. & A. Churchill, 1887.

London : Philadelphia, 1889.

Boston : Wright & Potter Printing Co, 1898.

Rockville, Maryland : National Institute on Drug Abuse, [1983]

LEXINGTON, Ky. (AP) -- Sophomore guards Jazmine Massengill and Robyn Benton transferred to Kentucky from Southeastern Conference rivals Wednesday.

Emanuel Ben-David, Bala Rajaratnam.

Source: Electronic Journal of Statistics, Volume 14, Number 1, 580--604.

Abstract:
The Wishart distribution defined on the open cone of positive-definite matrices plays a central role in multivariate analysis and multivariate distribution theory. Its domain of parameters is often referred to as the Gindikin set. In recent years, varieties of useful extensions of the Wishart distribution have been proposed in the literature for the purposes of studying Markov random fields and graphical models. In particular, generalizations of the Wishart distribution, referred to as Type I and Type II (graphical) Wishart distributions introduced by Letac and Massam in Annals of Statistics (2007) play important roles in both frequentist and Bayesian inference for Gaussian graphical models. These distributions have been especially useful in high-dimensional settings due to the flexibility offered by their multiple-shape parameters. Concerning Type I and Type II Wishart distributions, a conjecture of Letac and Massam concerns the domain of multiple-shape parameters of these distributions. The conjecture also has implications for the existence of Bayes estimators corresponding to these high dimensional priors. The conjecture, which was first posed in the Annals of Statistics, has now been an open problem for about 10 years. In this paper, we give a necessary condition for the Letac and Massam conjecture to hold. More precisely, we prove that if the Letac and Massam conjecture holds on a decomposable graph, then no two separators of the graph can be nested within each other. For this, we analyze Type I and Type II Wishart distributions on appropriate Markov equivalent perfect DAG models and succeed in deriving the aforementioned necessary condition. This condition in particular identifies a class of counterexamples to the conjecture.

We study the information content of nuclear masses from the perspective of global models of nuclear binding energies. To this end, we employ a number of statistical methods and diagnostic tools, including Bayesian calibration, Bayesian model averaging, chi-square correlation analysis, principal component analysis, and empirical coverage probability. Using a Bayesian framework, we investigate the structure of the 4-parameter Liquid Drop Model by considering discrepant mass domains for calibration. We then use the chi-square correlation framework to analyze the 14-parameter Skyrme energy density functional calibrated using homogeneous and heterogeneous datasets. We show that a quite dramatic parameter reduction can be achieved in both cases. The advantage of Bayesian model averaging for improving uncertainty quantification is demonstrated. The statistical approaches used are pedagogically described; in this context this work can serve as a guide for future applications.

Holger Dette, Weichi Wu.

Source: The Annals of Statistics, Volume 47, Number 6, 3578--3608.

Abstract:
This paper considers the problem of testing if a sequence of means $(mu_{t})_{t=1,ldots ,n}$ of a nonstationary time series $(X_{t})_{t=1,ldots ,n}$ is stable in the sense that the difference of the means $mu_{1}$ and $mu_{t}$ between the initial time $t=1$ and any other time is smaller than a given threshold, that is $|mu_{1}-mu_{t}|leq c$ for all $t=1,ldots ,n$. A test for hypotheses of this type is developed using a bias corrected monotone rearranged local linear estimator and asymptotic normality of the corresponding test statistic is established. As the asymptotic variance depends on the location of the roots of the equation $|mu_{1}-mu_{t}|=c$ a new bootstrap procedure is proposed to obtain critical values and its consistency is established. As a consequence we are able to quantitatively describe relevant deviations of a nonstationary sequence from its initial value. The results are illustrated by means of a simulation study and by analyzing data examples.

Heng Lian, Kaifeng Zhao, Shaogao Lv.

Source: The Annals of Statistics, Volume 47, Number 5, 2922--2949.

Abstract:
In this paper, we consider the local asymptotics of the nonparametric function in a partially linear model, within the framework of the divide-and-conquer estimation. Unlike the fixed-dimensional setting in which the parametric part does not affect the nonparametric part, the high-dimensional setting makes the issue more complicated. In particular, when a sparsity-inducing penalty such as lasso is used to make the estimation of the linear part feasible, the bias introduced will propagate to the nonparametric part. We propose a novel approach for estimation of the nonparametric function and establish the local asymptotics of the estimator. The result is useful for massive data with possibly different linear coefficients in each subpopulation but common nonparametric function. Some numerical illustrations are also presented.

Grant (Family)

Three weeks before he was shot dead, Miguel Calderon, an inmate in the lawless Los Llanos jail on Venezuela's central plains, sent a voice message to his father. Like many of the prisoners in Venezuela's overcrowded and violent penitentiaries, Los Llanos's 4,000 inmates normally subsist on food relatives bring them. The guards, desperate themselves amid national shortages, began stealing the little food getting behind bars, inmates said, forcing some prisoners to turn to eating stray animals.

Andrés F. Barrientos, Víctor Peña.

Source: Bayesian Analysis, Volume 15, Number 2, 363--388.

Abstract:
In this article, we present data-subsetting algorithms that allow for the approximate and scalable implementation of the Bayesian bootstrap. They are analogous to two existing algorithms in the frequentist literature: the bag of little bootstraps (Kleiner et al., 2014) and the subsampled double bootstrap (Sengupta et al., 2016). Our algorithms have appealing theoretical and computational properties that are comparable to those of their frequentist counterparts. Additionally, we provide a strategy for performing lossless inference for a class of functionals of the Bayesian bootstrap and briefly introduce extensions to the Dirichlet Process.

Bisti Badlands’ bizarre eggs bring a bit of Easter to the New Mexico desert

A new study ties the ousting of women directors, actors, producers and screenwriters to the rise of entertainment studios

In the first two weeks of the operation, the sports organization's meal program has used almost 25,000 pounds of chicken, 15,000 pounds of potatoes, 10,000 pounds of mixed vegetables and 8,000 pounds of pasta.

Montreal Canadiens goaltender Carey Price has reached out to give support to two boys who lost their parents during the Nova Scotia mass shooting last month.