This Festschrift is dedicated to Gotz Trenkler on the occasion of his 65th birthday. As can be seen from the long list of contributions, Gotz has had and still has an enormous range of interests, and colleagues to share these interests with. He is a leading expert in linear models with a particular focus on matrix algebra in its relation to statistics. He has published in almost all major statistics and matrix theory journals. His research activities also include other areas (like nonparametrics, statistics and sports, combination of forecasts and magic squares, just to mention afew). Gotz...