Using this relationship, the day-trip changes caused by changes in travel costs can be converted to a change in the number of fishing licenses by dividing the day-trip changes (AYij) by the average day-trip per fisherman (Yij).

Thenceforth I thought thee worth my nearer view.

Let's roll up a doobie and toke.

I had not strength to stir or strive, / But felt that I was still alive— […]