Results 81 to 90 of about 6,825,486 (291)

Species traits shape the relationship between local and regional species abundance distributions

open access: yesEcosphere, 2019
The species abundance distribution (SAD) depicts the relative abundance of species within a community, which is a key concept in ecology. Here, we test whether SADs are more likely to either follow a lognormal‐like or follow a logseries‐like distribution
Murilo Dantas de Miranda   +3 more
doaj   +1 more source

Assessing the Estimands and Estimates of Hospitalization Rates in Health Economics and Clinical Medicine

open access: yesHealth Economics, EarlyView.
ABSTRACT Even though data on hospital admissions are widely used in health research, hospitalization‐related estimands measured using these data are not always clearly conceptualized. Consequently, estimators of these quantities can have unclear rationales and undesirable properties.
Aditya Jain   +7 more
wiley   +1 more source

MENENTUKAN HARGA KONTRAK BERJANGKA NILAI TUKAR RUPIAH TERHADAP DOLLAR AS MENGGUNAKAN DISTRIBUSI LOGNORMAL

open access: yesE-Jurnal Matematika, 2015
The purpose of this study is to determine the fair price of a futures contract for the IDR (Rupiah) against the USD using lognormal distribution simulation. This result is compared with interest rate parity theorem.
GEDE SUMENDRA   +2 more
doaj  

A Study on Zografos-Balakrishnan Log-Normal Distribution

open access: yesRevstat Statistical Journal
In this article, we studied a generalization of the log-normal distribution called Zografos-Balakrishnan log-normal distribution and investigate its various important properties and functions including moments, quantile function, various reliability ...
D. S. Shibu, S. L. Nitin, M. R. Irshad
doaj   +1 more source

A produtividade dos autores sobre a Lei de Lotka Authors' productivity on Lotka's Law

open access: yesCiência da Informação, 2008
Estuda a produção estratificada dos autores produtores da literatura sobre a Lei de Lotka de 1922 a 2003 e analisa essa produtividade através dos modelos Poisson lognormal e Gauss Poisson inversa generalizada.
Ruben Urbizagastegui
doaj   +1 more source

Bayesian Model Averaging in Causal Instrumental Variable Models

open access: yesJournal of Applied Econometrics, EarlyView.
ABSTRACT Instrumental variables are a popular tool to infer causal effects under unobserved confounding, but choosing suitable instruments is challenging in practice. We propose gIVBMA, a Bayesian model averaging procedure that addresses this challenge by averaging across different sets of instrumental variables and covariates in a structural equation ...
Gregor Steiner, Mark Steel
wiley   +1 more source

Finding Most Reliable Path With Extended Shifted Lognormal Distribution

open access: yesIEEE Access, 2018
Travel time uncertainty may cause late arrival and impose a high penalty on travelers. There is a growing interest in modeling travel time uncertainty to optimize the reliability of travel time at the path and network level. Real data analysis finds that
Zhenzhen Yang   +4 more
doaj   +1 more source

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