This PhD thesis consists of six self-contained articles. All of them are connected to Georg Rasch and his contributions to statistics. Chapter 1 is a biography of Georg Rasch covering the years 1901 to the late 1940s. Special attention is paid Rasch’s road from being a mathematician to becoming a statistician. His life in the late 1940s is also described at some length. He was a statistical consultant, but he also lectured on mathematics and statistics at the University of Copenhagen. This way, and especially by influencing his young assistants, Rasch was a prominent figure in the progress of statistics in Denmark. Chapter 2 rediscovers Rasch’s work on Growth. We shall see the theory that Rasch developed and explore the events that inspired him to analyse growth. The Growth Model had it’s origin in an empirical analysis of calves, but afterwards Rasch used it to model the growth of other animals. By time, Rasch became intrigued by developing a theoretical frame for the Growth Model. Chapter 2 also includes an empirical example of using the Growth Model on recent data
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