Results 71 to 80 of about 159,341 (296)

Testing for no autocorrelation using a modified Lobato test [PDF]

open access: yes
This paper suggests modifying the Lobato test for no autocorrelation by using the bandwidth parameter (M) of the covariance estimator as a fixed proportion of the sample size (T): M=bT, where b (0,1] is a constant.
Jen-Je Su
core  

Assessing Strengths and Limitations of Magnetoencephalography Source Imaging With Intracerebral EEG

open access: yesAdvanced Science, EarlyView.
Simultaneous MEG and stereotactic EEG (SEEG) recordings provide a direct validation framework for MEG source imaging in focal epilepsy. Virtual SEEG signals derived from MEG reconstructions reveal significant agreement with intracranial measures of spike localization, resting‐state oscillations, and functional connectivity, while also identifying ...
Jawata Afnan   +10 more
wiley   +1 more source

Risk and Returns of Diversified Cropping Systems under Nonnormal, Cross-, and Autocorrelated Commodity Price Structures

open access: yesJournal of Agricultural and Resource Economics, 2000
This study analyzes the risks of diversified tropical cropping systems that combine cocoa, plantain, and tree-crop components in different proportions versus traditional monocultures.
Octavio A. Ramirez, Eduardo Somarriba
doaj   +1 more source

The impact of institutional investors on risk and stock return autocorrelation in the context of the polish pension reform [PDF]

open access: yes
The main aim of this paper is to examine the relationship between the increasing share of institutional investors resulting from the pension reform in Poland and stock return autocorrelation as well as risk level on the Warsaw Stock Exchange. The problem
Henryk Gurgul, Pawel Majdosz
core  

A simulation study on specifying a regression model for spatial data: choosing between heterogeneity and autocorrelation effects [PDF]

open access: yes, 2018
In this simulation study, regressions specified with autocorrelation effects are compared against those with relationship heterogeneity effects, and in doing so, provides guidance on their use. Regressions investigated are: (1) multiple linear regression,
Paul Harris, Harris, P.
core   +1 more source

Metagenomic Association Uncovers Host Genotype‐Structured Rhizobacterial Networks and Novel Taxa That Enhance Soybean Salt Tolerance

open access: yesAdvanced Science, EarlyView.
An STI‐guided metagenomic association framework links soybean salt‐tolerance phenotypes with rhizosphere microbiome composition and network organization in natural saline soils. The approach identifies candidate beneficial taxa, including Thalassospira xiamenensis, and provides an efficient strategy for mining stress‐protective microbes from native ...
Yu Luo   +3 more
wiley   +1 more source

Monte Carlo experiments on the effect of serial correlation on the Mann-Kendall test of trend

open access: yesMeteorologische Zeitschrift, 1995
Die Wirkung von zeitlicher (serieller) Korrelation in einer Zeitserie auf das Resultat eines Trendtests nach Mann-Kendall wird im Rahmen eines Simulationsexperiments untersucht.
Ashwini Kulkarni, Hans von Storch
doaj   +1 more source

The Decision of When to Buy a Frequently Purchased Good: A Multi-Period Probit Model

open access: yesJournal of Agricultural and Resource Economics, 2000
Increased availability of scanner-based panel data has enabled researchers to better understand nondurable commodity purchase dynamics. In this study, we focus on one component of the purchase process--when to buy.
Brian W. Gould, Diansheng Dong
doaj   +1 more source

Heteroskedasticity-Autocorrelation Robust Standard Errors Using the Bartlett Kernel without Truncation [PDF]

open access: yes
In this paper we analyze heteroskedasticity-autocorrelation (HAC) robust tests constructed using the Bartlett kernel without truncation. We show that while such an HAC estimator is not consistent, asymptotically valid testing is still possible.
Kiefer, Nicholas M.
core  

Automation and Active Learning for the Multi‐Objective Optimization of Antibody Formulations

open access: yesAdvanced Science, EarlyView.
Successful antibody formulation necessitates balancing factors such as thermal stability, colloidal stability, and viscosity across a vast excipient design space. This work integrates robotic liquid handling, high‐throughput biophysical characterization, and multi‐objective Bayesian optimization in an iterative closed‐loop Design‐Build‐Test‐Learn cycle.
D. Christopher Radford   +3 more
wiley   +1 more source

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