“‘Mathematical Methods and Models in Economic Planning, Management and Budgeting (Second Edition)’ is a work of great breath that describes a set of mathematical models and methods useful to analyze real economic and managerial decisions, aiming to give a great support to their effectiveness. … an outstanding work, indispensable for economists, mathematical economists, and members of the computer technology community. Important for academics, researchers, real-world professionals and policy makers.” (Manuel Alberto M. Ferreira, International Journal of Latest Trends in Finance & Economic Sciences, Vol. 7 (2), December, 2017)