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. 2016 May 3;5(2):e11. doi: 10.2196/ijmr.5196

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©Irene Tagliente, Leopoldo Trieste, Terje Solvoll, Fabrizio Murgia, Sergio Bella. Originally published in the Interactive Journal of Medical Research (http://www.i-jmr.org/), 03.05.2016.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Interactive Journal of Medical Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.i-jmr.org/, as well as this copyright and license information must be included.

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Economic equations used in the calculations. Equation (a) is the actualization of saving st (t < 2015), and equation (b) is the actualization of saving st (t > 2015).