Results 81 to 90 of about 46,328 (287)

Mixture of bivariate Poisson regression models with an application to insurance [PDF]

In a recent paper Bermúdez [2009] used bivariate Poisson regression models for ratemaking in car insurance, and included zero-inflated models to account for the excess of zeros and the overdispersion in the data set. In the present paper, we revisit this
Dimitris Karlis, Lluís Bermúdez
core  

Inequalities in intraspecific plant–lemur interactions drive seed dispersal patterns

Oikos, EarlyView.
Biotic interactions occur between individuals and accumulate to shape species‐level interaction structure across a community. Skewed interaction structures, where a few individuals are highly connected and most have few interactions, are increasingly identified at the individual‐level.
Jadelys Tonos, Hasinavalona Rakotoarisoa, Onja H. Razafindratsima   +2 more
wiley   +1 more source

Statistical and Economic Evaluation of Time Series Models for Forecasting Arrivals at Call Centers

, 2018
Call centers' managers are interested in obtaining accurate point and distributional forecasts of call arrivals in order to achieve an optimal balance between service quality and operating costs.
Bastianin, Andrea, Galeotti, Marzio, Manera, Matteo   +2 more
core   +1 more source

Age ratio in groups of a social ungulate affects epizoochorous dispersal and diaspore exchanges

Oikos, EarlyView.
Animal‐mediated seed dispersal is a key process in plant population dynamics, species distribution and ecosystem functioning. As long‐distance dispersal agents, ungulates help to maintain native plant populations facing abiotic changes in their habitat and habitat fragmentation or habitat loss.
Antoine Roux, Cloé Balson, Morgane Audiguier, Marie Battista, Didier Marcon, Olivier Pays, Christophe Baltzinger   +6 more
wiley   +1 more source

A Bimodal Extension of the Beta-Binomial Distribution with Applications

Axioms
In this paper, we propose an alternative distribution to model count data exhibiting uni/bimodality. It arises as a weighted version of the beta-binomial distribution, which is defined by a parametric weight function that admits up to two modes for the ...
Jimmy Reyes, Josu Najera-Zuloaga, Dae-Jin Lee, Jaime Arrué, Yuri A. Iriarte   +4 more
doaj   +1 more source

Mean and Variance Modeling of Under- and Overdispersed Count Data

Journal of Statistical Software, 2016
This article describes the R package CountsEPPM and its use in determining maximum likelihood estimates of the parameters of extended Poisson process models.
David M. Smith, Malcolm J. Faddy
doaj   +1 more source

Partial recovery of large seed arrival following ecological restoration in fragmented tropical rainforests

Oikos, EarlyView.
Forest restoration success depends crucially on the reinitiation of ecological processes such as seed arrival that drive natural regeneration. We know little about whether, by increasing and diversifying local seed sources to alleviate seed limitation, and attracting animal frugivores to alleviate dispersal limitation, restoration could shift seed ...
Aparna Krishnan, Jyotsna Nag, S. Arun, Divya Mudappa, T. R. Shankar Raman, Mahesh Sankaran, Anand M. Osuri   +6 more
wiley   +1 more source

Control of glycaemia and its related factors in patients with type 2 diabetes, north of Iran: generalized linear mixed models and prevalence of overdispersion in patients [PDF]

Health Science Monitor
Background & Aims:  Glycemic control is very important to prevent or suspend complications in patients with type 2 diabetes (PT2D). The aim of this study was to investigate the status of glycemic control and its related factors in patients with type 2 ...
Samaneh Hosseinzadeh, Saeideh Davar
doaj  

Wild meat consumption in changing rural landscapes of Indonesian Borneo

People and Nature, EarlyView.
Abstract Wild meat can play a crucial role in the food system of rural communities residing near tropical forests. Yet, socio‐ecological changes across tropical landscapes are impacting the patterns and sustainability of meat consumption. To understand the prevalence, frequency and drivers of wild meat, domestic meat and fish consumption in this ...
Katie L. Spencer, Daniel J. Ingram, Namrata B. Anirudh, Ardiantiono, Susan M. Cheyne, Leejiah J. Dorward, Abdul Kadir, Michaela G. Y. Lo, Courtney L. Morgans, Jatna Supriatna, Nurul L. Winarni, Freya A. V. St. John, Matthew J. Struebig   +12 more
wiley   +1 more source

Generalized Additive Models for Location Scale and Shape (GAMLSS) in R

Journal of Statistical Software, 2007
GAMLSS is a general framework for fitting regression type models where the distribution of the response variable does not have to belong to the exponential family and includes highly skew and kurtotic continuous and discrete distribution.
D. Mikis Stasinopoulos, Robert A. Rigby
doaj