The aim of this study is to identify factor(s) influencing imbalance in the sex distribution of children (more children of the same sex) of the multiparous women attending an antenatal clinic in Hong Kong. A retrospective study was carried out to compare the expected and observed sex ratios of...

Exact and asymptotic distributions of the maximum likelihood estimator of the autoregressive parameter in a first-order bifurcating autoregressive process with exponential innovations are derived. The limit distributions for the stationary, critical and explosive cases are unified via a single...

Bifurcating autoregressive processes are used to model each line of descent in a binary tree as a standard AR(p) process, allowing for correlations between nodes which share the same parent. Limit distributions of the least-squares estimators of the model parameters for a pth-order bifurcating...

Parameter estimation based on the differences of two positive exponential family random variables is studied. Waiting time data, adjusted for idle times when necessary, are used for estimating the parameters in GI/G/1 queues. The sampling plan presented uses incomplete information on the...

First-principles calculations with the full-potential linearized augmented plane-wave (FP-LAPW) method have been performed to investigate detailed electronic and linear optical properties of Sr<Subscript>2</Subscript>CuO<Subscript>2</Subscript>Cl<Subscript>2</Subsc ript>, which is a classical low-dimensional antiferromagnet (AFM) charge transfer (CT) insulator....<//subsc></subscript></subscript></subscript>