Results 21 to 30 of about 513 (127)

Involution factorizations of Ewens random permutations [PDF]

Discrete Mathematics & Theoretical Computer Science
An involution is a bijection that is its own inverse. Given a permutation $σ$ of $[n],$ let $\mathsf{invol}(σ)$ denote the number of ways $σ$ can be expressed as a composition of two involutions of $[n].$ We prove that the statistic $\mathsf{invol}$ is ...
Charles Burnette
doaj   +1 more source

Relatives of the Ewens Sampling Formula in Bayesian Nonparametrics

Statistical Science, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Favaro, Stefano, James, Lancelot Fitzgerald   +1 more
openaire   +3 more sources

A simple method for estimating genetic diversity in large populations from finite sample sizes

BMC Genetics, 2009
Background Sample size is one of the critical factors affecting the accuracy of the estimation of population genetic diversity parameters. Small sample sizes often lead to significant errors in determining the allelic richness, which is one of the most ...
Rajora Om P, Pandey Madhav, Bashalkhanov Stanislav   +2 more
doaj   +1 more source

Exploiting the Feller Coupling for the Ewens Sampling Formula

Statistical Science, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Arratia, Richard, Barbour, A. D., Tavaré, Simon   +2 more
openaire   +2 more sources

On the Functional Central Limit Theorem for the Ewens Sampling Formula [PDF]

The Annals of Applied Probability, 1991
For each natural number \(n\), a random partition of \(n\) is defined by the so-called Ewens sampling formula with parameter \(\theta>0\). When the total number of individuals is \(n\) in a birth process with immigration, having immigration rate \(\theta\) and birth rate 1, the sizes of the initiated families of each migrant also follow Ewens sampling ...
Donnelly, Peter, Kurtz, Thomas G., Tavare, Simon   +2 more
openaire   +2 more sources

Random derangements and the Ewens Sampling Formula

, 2020
We study derangements of $\{1,2,\ldots,n\}$ under the Ewens distribution with parameter $θ$. We give the moments and marginal distributions of the cycle counts, the number of cycles, and asymptotic distributions for large $n$. We develop a $\{0,1\}$-valued non-homogeneous Markov chain with the property that the counts of lengths of spacings between the
da Silva, Poly H., Jamshidpey, Arash, Tavaré, Simon   +2 more
openaire   +2 more sources

Diffusion Processes and the Ewens Sampling Formula

Statistical Science, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Governance Composition, Gender Diversity, and Regional Context as Performance Drivers in Italian Innovative Start‐Ups

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Innovative start‐ups play a crucial role in promoting innovation and economic growth, while also contributing to technological competitiveness. This study analyzes the factors influencing the economic performance of these start‐ups, focusing on governance aspects and corporate resources, with particular attention to team composition, company ...
Giovanni Baldissarro, Gianpaolo Iazzolino, Donato Morea   +2 more
wiley   +1 more source

Ewens sampling formulae with and without selection

Journal of Computational and Applied Mathematics, 2007
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openaire   +3 more sources

When stakeholders are imposed: Non‐chosen stakeholder orientation and venture performance

Strategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary Extending stakeholder theory into the entrepreneurship context, we examine the performance implications of externally imposed stakeholder orientation, which we conceptualize as non‐chosen stakeholder orientation. Given the resource constraints, short time horizons, and high levels of uncertainty that characterize ventures, we ...
Myeongho David Park, Per L. Bylund, Eunkwang Seo   +2 more
wiley   +1 more source