This article describes three approximation methods I used to solve the growth model (Model 1) studied by the National Bureau of Economic Research's nonlinear rational-expectations-modeling group ...

Asymmetric interactions between different species of molecules have previously been demonstrated to result in self-organized ...

Six non-linear growth functions were fitted to tree height-diameter data of ten conifer species collected in the inland Northwest of the United States. The data sets represented a wide range of tree ...