Robert B. O'Hara, How to make models add up — a primer on GLMMs, Annales Zoologici Fennici, Vol. 46, No. 2, Methods in Ecological Research (2009), pp. 124-137 ...

One linear model and two nonlinear models performed as well as the overall average of a group of experts. However, all of the models were outperformed by the most accurate expert.