Results 71 to 80 of about 25,265 (258)
Land Degradation &Development, EarlyView.ABSTRACT Abiotic and biotic filters shape microbial phylogenetic diversity. Here, we evaluated bacterial phylogenetic diversity in micro‐ and macro‐aggregates across primary and secondary soil successions to assess the relative influence of niche‐based and neutral processes.
Lidong Huang +2 more
wiley +1 more source
Double Generalized Beta-Binomial and Negative Binomial Regression Models
Revista Colombiana de Estadística, 2017 Overdispersion is a common phenomenon in count datasets, that can greatly affect inferences about the model. In this paper develop three joint mean and dispersion regression models in order to fit overdispersed data.
EDILBERTO CEPEDA-CUERVO +1 more
doaj +1 more source
Leisure and the Opportunity Cost of Travel Time in Recreation Demand Analysis: A Re-Examination [PDF]
Using count data models that account for zero-truncation, overdispersion, and endogenous stratification, this paper estimates the value of access to recreational parks.
Amoako-Tuffour, Joe +1 more
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Limnology and Oceanography Bulletin, EarlyView.Abstract Statistical analysis is a cornerstone of scientific research, yet young researchers in aquatic sciences often struggle when analyses begin without a clearly defined research question or a solid understanding of the data structure. This disconnect between data collection and analytical decision‐making recurrently drives unreliable findings ...
Juline Rodrigues da Conceição +1 more
wiley +1 more source
Modeling heterogeneity in ranked responses by nonparametric maximum likelihood : How do Europeans get their scientific knowledge? [PDF]
, 2010 This paper is motivated by a Eurobarometer survey on science knowledge. As part of the survey, respondents were asked to rank sources of science information in order of importance. The official statistical analysis of these data however failed to use the
Francis, B +8 more
core +2 more sources
A Comparison of the Robust Zero-Inflated and Hurdle Models with an Application to Maternal Mortality
Mathematical and Computational ApplicationsThis study evaluates the performance of count regression models in the presence of zero inflation, outliers, and overdispersion using both simulated and real-world maternal mortality dataset.
Phelo Pitsha +2 more
doaj +1 more source
A note on overdispersion as an index of behavioural synchrony: a pilot study in dairy cows
Animal, 2011 We developed a method for studying the synchrony of behaviour based on calculations of overdispersion of a binomial process. The lying behaviour of cows was investigated under two different housing units inside the same barn.
S. Raussi +5 more
doaj +1 more source
Semiparametric estimation of on-stie count data models [PDF]
This article proposes semiparametric estimation of on-site count data models based on a series expansion approach of Gurmu, Rilstone and Stern (1999, Journal of Econometrics 88, 123-150), which is flexible and adaptable for a form of overdispersion as ...
Katsuhito Nohara, Masaki Narukawa
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The role of edaphic environment and climate in structuring phylogenetic pattern in seasonally dry tropical plant communities [PDF]
, 2015 This study was made possible through the kind financial support of the São Paulo Research Foundation - http://fapesp.br/en (Fundação de Amparo à Pesquisa do Estado de São Paulo - Fapesp 2013/15280-9).Seasonally dry tropical plant formations (SDTF) are ...
Marcelo Freire Moro +23 more
core +1 more source
Artificial Voices, Real Causes: The Dilemma of Virtual Influencer‐Driven Brand Activism
Psychology &Marketing, EarlyView.ABSTRACT Brands are more frequently adopting virtual influencers (VIs) to lead activism campaigns. However, little is known about when and how such activism effectively drives consumer engagement. This research, in Study 1, examines 14,464 Instagram posts from 18 diverse VIs using large‐scale analytics to assess engagement intensity and the dynamics of
Sampa Anupurba Pahi +4 more
wiley +1 more source