Abstract
The best known result about the joint distribution of the backward and forward recurrence times in a renewal process concerns the asymptotic behavior for the tail of that bivariate distribution. In the present paper we study the joint behavior of the recurrence times at a fixed time point t, and we obtain both exact results and bounds for their joint tail behavior. We also obtain results about the joint moments of these two random variables and we show in particular that the expectation of the product between the two recurrence times increases with time when the interarrival distribution has a decreasing failure rate. The results are illustrated by some numerical examples.
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The authors wish to thank the referee for their valuable and constructive comments, which improved the presentation of the paper.
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Losidis, S., Politis, K. & Psarrakos, G. Exact Results and Bounds for the Joint Tail and Moments of the Recurrence Times in a Renewal Process. Methodol Comput Appl Probab 23, 1489–1505 (2021). https://doi.org/10.1007/s11009-020-09787-w
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DOI: https://doi.org/10.1007/s11009-020-09787-w
Keywords
- Renewal process
- Renewal density
- Forward recurrence time
- Backward recurrence time
- Spread
- Joint moments
- Failure rate
- Upper orthant stochastic order