Abstract
In this paper we introduce a new discrete time and continuous state space stationary process {Xn;n = 1,2,…}, such that Xn follows a two-parameter generalized exponential (GE) distribution. Joint distribution functions, characterization and some dependency properties of this new process have been investigated. The GE-process has three unknown parameters, two shape parameters and one scale parameter, and due to this reason it is more flexible than the existing exponential process. In presence of the scale parameter, if the two shape parameters are equal, then the maximum likelihood estimators of the unknown parameters can be obtained by solving one non-linear equation and if the two shape parameters are arbitrary, then the maximum likelihood estimators can be obtained by solving a two dimensional optimization problem. Two synthetic data sets, and one real gold-price data set have been analyzed to see the performance of the proposed model in practice. Finally some generalizations have been indicated.
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The authors would like to thank the unknown reviewers for making constructive suggestions which have helped to improve the earlier version of the manuscript significantly.
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Kundu, D. Stationary GE-Process and its Application in Analyzing Gold Price Data. Sankhya B 84, 575–595 (2022). https://doi.org/10.1007/s13571-021-00272-z
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DOI: https://doi.org/10.1007/s13571-021-00272-z
Keywords
- Generalized exponential distribution
- maximum likelihood estimators
- minification process
- maxification process.