This study offers a method of evaluating the stability of ranks of a data vector over time. In particular, we study improvement of a process observed over time where the data is ranked. The degree of competition at a major tennis championship (Wimbledon) as well as how trends in the level of...

This study focuses on individual home run hitting in Major League Baseball. It is observed that the distribution of the rate of home run hitting is highly right skewed, but it is becoming discernibly less so over time. Frequencies of the lowest rates have been decreasing, whereas the frequencies...

This article is an exploratory investigation of the distributional properties of market index returns using J. W. Tukey's g and h distributions. Specifically, it is shown that over sufficiently long periods of time, the distribution of the market index is adequately explained as a skewed,...

The athletic performances of men and women are compared based on worldrecord times for various distance events in swimming, running and skating. The ratio of the times of women to those of men against years is modelled through a modified exponential distribution. The rate of improvement is found...

This paper examines team performance in the NBA over the last five decades. It was motivated by two previous observational studies, one of which studied the winning percentages of professional baseball teams over time, while the other examined individual player performance in the NBA. These...