the hierarchy on the variance decomposition and the clustering effects have not been well documented. This paper discusses … how omitting one level in three-level models affects the variance decomposition and clustering in the resulting twolevel …

strategies for dealing with clustering in research of this type. On balance, the estimates point to a substantial and …

classrooms or schools), or individuals within groups (such as students). Since field experiments involve clustering, key aspects … into account clustering effects at the classroom and at the school level, sample size effects (e.g., number of students …

networks, such as connectivity, clustering, and the degree of the players, help to predict informed behavior in the lab. People …