When estimating multilevel models it is important for researchers to make sure their models fit their data. However, examining model fit can be quite cumbersome. We have developed the macro MIXED_FIT to help researchers assess model fit in a simple yet comprehensive way. Specifically, this paper provides a SAS macro that incorporates changes in model fit statistics [i.e., -2 log likelihood (-2L...

Though world-of-mouth (WOM) communications is a pervasive and intriguing phenomenon, little is known on its effect in terms of macro-behavior. The purpose of this study is to investigate the WOM effect on macro-level marketing to explain the herd behavior of Chinese consumers. To achieve our goal, the system dynamics was applied build a simulation model for a popular herd behavior happening in ...

[1] We use an ocean circulation, biogeochemistry, and ecosystem model to explore the interactions between ocean circulation, macroand micro-nutrient supply to the euphotic layer, and biological productivity. The model suggests a tight coupling between the degree of iron limitation in the upwelling subpolar and tropical oceans and the productivity of the adjacent subtropical gyres. This coupling...