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This is a topical issue on the 16th Asia–Pacific Symposium on Intelligent and Evolutionary Systems (IES) which was held in Kyoto from December 12–14, 2012. This special issue contains six articles related to evolutionary algorithms that are designed to solve optimization problems, network concepts, mathematical methods and their real world applications.

It is with profound sadness that we write this statement for the former editor of this journal, our colleague and friend, Michael McAleer. Mike passed away peacefully on July 8, 2021, and he will be sorely missed by his vast number of colleagues and friends. Mike served on the editorial board of the Annals of Financial Economics (AFE) for more than 16 years and was the Editor-in-Chief since 2016. Mike was a wonderful friend, colleague, and mentor to all that knew him, and provided countless hours of service to AFE. He touched our lives deeply and was ever ready to lend a hand in any way he could, whether through his vast knowledge of econometrics, his willingness to work together on research projects, his efforts on behalf of this journal, or his contagious joie de vivre. We will miss him greatly. In the remainder of this editorial, we include a short biography, as well as a number of statements from co-authors, colleagues and friends of Mike.