*Title: Probabilistic reconciliation of hierarchies: a Bayesian approach *Abstract: When time series are organized into hierarchies, the forecasts have to satisfy some summing constraints. Forecasts which are independently generated for each time series (base forecasts) do not satisfy the constraints. Reconciliation algorithms adjust the base forecast in order to satisfy the summing constraints: in general they also improve the accuracy. We present a novel reconciliation algorithm based on Bayes' rule; we discuss under which assumptions it is optimal and we show in extensive experiments that it compares favorably to the state-of-the-art reconciliation methods *Speaker: Giorgio Corani is senior researcher at IDSIA; his research interests include probabilistic graphical models, Bayesian methods, and time series. www.idsia.ch/~giorgio *Date: Wednesday, 26th of June 2019, 12:00-13:00 *Location: Manno, Galleria 1, 2nd floor, room G1-201 *Doodle registration: Pizza and drinks will be offered at the end of the talk. If you plan to attend, please register in a timely fashion at the following link so that we will have no shortage of food: https://doodle.com/poll/zfte8pwmatm4m2tm