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Open AccessJournal ArticleDOI

Central limit theorems for a hypergeometric randomly reinforced urn

TLDR
Some central limit theorems in the sense of stable convergence and of almost sure conditional convergence are proved, which are stronger than convergence in distribution.
Abstract
We consider a variant of the randomly reinforced urn where more balls can be simultaneously drawn out and balls of different colors can be simultaneously added. More precisely, at each time-step, the conditional distribution of the number of extracted balls of a certain color, given the past, is assumed to be hypergeometric. We prove some central limit theorems in the sense of stable convergence and of almost sure conditional convergence, which are stronger than convergence in distribution. The proven results provide asymptotic confidence intervals for the limit proportion, whose distribution is generally unknown. Moreover, we also consider the case of more urns subjected to some random common factors.

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Journal ArticleDOI

Synchronization of reinforced stochastic processes with a network-based interaction

TL;DR: In this article, a model of interacting stochastic processes with reinforcement has been introduced, where synchronization is induced along time by the reinforcement mechanism itself and does not require a large-scale limit.
Proceedings ArticleDOI

Asymptotics in randomized urn models

Zhidong Bai, +1 more
TL;DR: In this article, the authors studied a very general urn model stimulated by designs in clinical trials, where the number of balls of different types added to the urn at trial n depends on a random outcome directed by the composition at trials 1,2,…,n−1.
Journal ArticleDOI

Networks of reinforced stochastic processes: asymptotics for the empirical means.

TL;DR: In this paper, the authors studied the asymptotic behavior of the empirical means of the stochastic processes of the personal inclinations of the agents in the graph, proving their almost sure synchronization and central limit theorems in the sense of stable convergence.
Posted Content

The Rescaled Polya Urn: local reinforcement and chi-squared goodness of fit test

TL;DR: In this article, a new variant of the Eggenberger-polya urn, called the "Rescaled" polya, is introduced, which is characterized by the following features: (i) a local reinforcement mechanism mainly based on the last observations, (ii) a random persistent fluctuation of the predictive mean, and (iii) a long-term convergence of the empirical mean to a deterministic limit.
Journal ArticleDOI

An urn model with random multiple drawing and random addition

TL;DR: In this article , the authors considered a two-color urn model with multiple drawing and random time-dependent addition matrix, where the number of sampled balls at each time-step is random, the addition matrix is not balanced and it has general random entries.
References
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Journal ArticleDOI

Competing technologies, increasing returns, and lock-in by historical events*

TL;DR: In this article, the authors explore the dynamics of allocation under increasing returns in a context where increasing returns arise naturally: agents choosing between technologies competing for adoption, and examine how these influence selection of the outcome.
Posted Content

Predicting How People Play Games: Reinforcement Learning in Experimental Games with Unique, Mixed Strategy Equilibria

TL;DR: In this article, the ex ante predictive power of reinforcement learning models and their ex ante descriptive power was investigated in all experiments we could locate involving 100 periods or more of games with a unique equilibrium in mixed strategies.
Journal ArticleDOI

A survey of random processes with reinforcement

TL;DR: The models surveyed in this paper include generalized Polya urns, reinforced random walks, interacting urn models, and continuous reinforced processes, with a focus on methods and results, with sketches provided of some proofs.
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