The criticism of Messrs Wissler and Comer, in The Annalist of May 13, on my article of April 1, involves partly questions of definition and partly questions of statistics, causation and purpose. I agree with them on what they call the “statistician’s dilemma.” The function of the statistician is to describe and reveal quantitative facts. He is not concerned with causal relationships. That is left to the economist who makes use of these statistical facts in attempting to trace relationships of cause and effect.