Bortkiewicz's Data and the Law of Small

Summary L. von Bortkiewicz [1868-1931] is remembered partly in connection with his data on deaths from horse kicks. This was one of several data sets used by Bortkiewicz to illustrate his 'Law of Small Numbers'. We discuss this law (which was and is widely misunderstood) in some depth, with special reference to the sensitivity of the divergence coefficient as a test statistic, an aspect which we feel should receive more attention in the analysis of the horse kick data. We dispel some common misconceptions about 'censorship' of this data. The other data sets are mentioned.