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Mehrnaz Mohammadpour

Mehrnaz Mohammadpour

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Faculty of Mathematical Sciences
Address: Department of Statistics, University of Mazandaran, Babolsar, Iran
Phone: 011-35302475

Research

Title
An integer-valued bilinear time series model via two random operators
Type
JournalPaper
Keywords
Autocovariance function; Binomial thinning operator; Estimation; Integer-valued bilinear processes; Pegram operator
Year
2019
Journal MATHEMATICAL AND COMPUTER MODELLING OF DYNAMICAL SYSTEMS
DOI
Researchers Mehrnaz Mohammadpour ، Sakineh Ramezani ، Hassan S. Bakouch

Abstract

This paper presents a new stationary integer-valued bilinear time series model of the first order by mixing the thinning and Pegram operators. Some statistical properties of the model are obtained, involving the conditional moments, autocovariance and spectral density function. Estimation of the model parameters is discussed using the Yule-Walker and conditional least squares methods with a simulation study for evaluating the performance of those estimators. Applicability of the process is investigated using a practical count data set with comparing the model to a competitive bilinear model using some marginal distributions of innovations. Issue of forecasting data is discussed under the proposed model.