Special Issues of the International Journal of Forecasting (IJF)are exclusively devoted to the Competitions. They consist of more than 30 papers (the M4 includes a foreword by Nassim Nicholas Taleb) that describe all winning methods and related articles as well as discussion papers and commentaries on the various aspects of the competitions.
The M4 Special Issue has been published (see below) while the one devoted to the M5 Competition is under preparation also including more than 30 papers. The following two articles have been already in press and the remaining will follow soon (https://www.sciencedirect.com/science/article/abs/pii/S0169207021001023, “Applicability of the M5 to Forecasting at Walmart” and https://www.sciencedirect.com/science/article/abs/pii/S0169207021001151, “Robust recurrent network model for intermittent time-series forecasting”)
A related publication to the M Competitions is the new paper “The future of forecasting competitions: Design attributes and principles” accepted for publication in the IJDS. co-authored by Spyros Makridakis, Chris Fry, Fotios Petropoulos and Evangelos Spiliotis (see https://arxiv.org/abs/2102.04879 ).