Basic methods to compute the required sample size are well understood and supported by widely available software. However, the sophistication of the sample size methods commonly used has not kept pace with the complexity of the experimental designs most often employed in practice. In this paper,...

There is substantial evidence of a significant relationship between parents' income and sons' earnings in the UK, and that this relationship has strengthened over time. We extend this by exploring a broader measure of net family income as an outcome. In doing so, we uncover three additional...