I have two independent measures of my dependent variable. I hypothesized that one of the two is better in prediction the dependent variable. Let’s imagine that I would have measured the height of a bottle with (a) a ruler and (b) just my hand span. I want to be able to say that a predicts the height of a bottle better than b. Does anyone know how I can compare the two predictions? Can you recommend any papers on that topic? I know that I could compare correlation coefficients but I would like to compare explained variance or regression models.

Thanks a lot!