Investments with declining cost following a Lévy process

Fredrik Armerin

European Journal of Operational Research, 2023, vol. 304, issue 3, 1052-1062

Abstract: We consider an optimal investment problem in which the cost of the investment decreases over time. This decrease is modelled using the negative of a non-decreasing Lévy process. The decreasing cost is a way of modelling that innovations drive down the cost of the investment. We present general results on how to compute both the value of the investment, as well as the optimal time at which the investment should be done. Several explicit examples of how different Lévy processes influence the value of the investment are given as illustrations of the general results. The main tools used are fluctuation theory for Lévy processes and inversion of Laplace transforms. When the inversion can be done analytically, we can present analytical solutions where in some cases only numerical solution has previously been known.

Keywords: Uncertainty modelling; Irreversible investments; Optimal stopping; Product innovation; Lévy processes (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ejores:v:304:y:2023:i:3:p:1052-1062

DOI: 10.1016/j.ejor.2022.05.001

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