The following article was published, as shown, in the Journal of Applied Behavior Analysis in Fall 1974. I discovered it when it was mentioned by Michael S. Weisbach in his recent book The Economist’s Craft: An Introduction to Research, Publishing, and Professional Development.

As the Managing Editor of a professional academic journal, I am strongly committed to putting a lid on the length of articles. I believe that prose which is more crisp is also more easily understood, and that longer articles also tend to be less-read. With that well-known economist sense of humor, I sometimes say that a large part of value-added comes through subtraction. But even for me, this article is a little terse.