Continuous optimization is a vital research area with many active branches such as linear and nonlinear optimization, stochastic optimization, vector optimization, semi-infinite optimization, etc. Stability analysis of optimization problems is of crucial interest in applications, and makes optimization an ideal testing bench for many disciplines such as convex analysis, set-valued analysis, variational analysis, and wellposedness, among others.The present special issue offers some recent developments in this wide area and aims to honor Prof. Marco Antonio López Cerdá on the occasion of his 70th birthday, as well as to show recognition by his colleagues to his contribution to this field. His achievements include some monographs, several surveys and more than 150 scientific articles on optimality, duality, stability and algorithms in semi-infinite programming, Lipschitz-type properties, error bounds, subdifferential calculus, and others such as game theory, robustness, stationarity and regularity.Marco A. López was born in Alcoy (Alicante, Spain) in 1949 and has spent most of his academic career (since 1985) as a full professor of statistics and operations research at the University of Alicante, where nowadays he is Emeritus Professor. Marco is a corresponding fellow of the Spanish Royal Academy of Sciences, an Honorary Research Fellow of the Federation University (Australia), and a Doctor Honoris Causa at the University of Limoges (France). He has also led important research projects, theoretical and applied. From 2008 to 2012 he was the coodinator of i-MATH Consolider B J.