Polychronis Economou is an Assistant Professor in Statistics, affiliated to the Department of Civil Engineering (University of Patras, Greece). He holds a B.Sc. in Mathematics from the Department of Mathematics at University of Ioannina, Greece, a MSc in Applied mathematics and a PhD in Statistics from the National Technical University of Athens, Greece. His main research interests focus on the fields of Reliability Models, Diagnostic Tests, Biased Sampling, Time Series and Statistical Quality Control. His main publications have appeared in international journals including Applied Mathematics and Computation, Environmetrics, Journal of Applied Statistics, Australian & New Zealand Journal of Statistics and Metrika.