Describing, analyzing, and explaining patterns in eye movement behavior is crucial for understanding visual perception. Further, movements are increasingly used informing cognitive process models. In this article, we start by reviewing basic characteristics desiderata models of movements. Specifically, argue that there a need combining spatial temporal aspects eye-tracking data (i.e., fixation ...

Two related issues are seldom jointly addressed in the cross market price discovery literature: i) a model that focuses on non-price parameter, ii) testing a non-price parameter model against a price parameter model. We have two objectives in this paper. First, develop a joint trade direction model (JTDM) from the single market model in Madhavan, Richardson and Roomans (1997). Second, estimate ...

INTRODUCTION The objective of this study was to compare the associations of accelerometer-derived total activity counts per day and minutes of bouted moderate to vigorous physical activity (MVPA) with insulin resistance. METHODS The sample included 2,394 adults (aged ≥20 y) from the 2003-2006 National Health and Nutrition Examination Survey. Time spent in MVPA, measured by using 2 cutpoints (...

A recent report in the New England Journal of Medicine on prenatal screening for Down’s syndrome (Malone et al 2005) received much attention in the non-scientifi c press, such as Time (Wallis 2005) and Forbes (Gordon 2005) magazines. This paper describes the results from a multicenter study that showed that, when an integrated, multi-marker approach was combined with a specifi c algorithm, it w...

The past century has seen a steady increase in the need of estimating and predicting complex systems and making (possibly critical) decisions with limited information. Although computers have made possible the numerical evaluation of sophisticated statistical models, these models are still designed by humans because there is currently no known recipe or algorithm for dividing the design of a st...

The paper develops a new and easy-to-use F test in a time series GMM framework that allows for general forms of serial dependence. The test is based on the Wald statistic with a multiplicative correction factor and employs critical values from a standard F distribution. The F critical values are high-order correct under the conventional asymptotics. Monte Carlo simulations show that the F test ...

Well known encompassing tests are usually difficult to implement because it is difficult to compute the pseudo-true value of the quasi-maximum likelihood estimator. In this paper, we propose a more operational encompassing test that does not involve such pseudo-true value. Instead, the proposed test relies on the “pseudo-true score” which is relatively easier to evaluate. We show that this test...

This paper develops a uniform test of linearity against thresholds effects in the quantile regression framework. The test is based on the supremum of the Wald process over the space of quantile and threshold parameters. We establish the asymptotic null distribution of the test statistic for stationary weakly dependent processes, and propose a simulation method to approximate the critical values...

BANERJEE AND WELLNER (2001) introduced and studied the likelihood ratio statistic for testing the hypothesis that a monotone function takes on a fixed value at a fixed point in the context of estimating the distribution function of the survival time in the interval censoring model. In this paper we continue to use the interval censoring model as a simple "test problem" . We introduce three natu...

BACKGROUND To investigate whether pre-operative intraocular pressure (IOP) predicts outcome of trabeculectomy surgery in patients with primary open angle glaucoma over a 3-year period of follow-up. METHODS Retrospective cohort study, of a total of 61 patients (80 procedures) who had undergone trabeculectomy surgery after failed medical management at a single centre between 2000 and 2011. Pati...