Dear colleagues, I am a PhD candidate working on a study of researchers involved in multiple research projects. I am using a multi-level model to explain the contextual factors’ effects on interaction at the individual level. The model is similar to Hierarchical Linear Model, but it is more complicated because each individual is involved in one to five group-level units. I will be grateful if you can direct me to any paper using this model or any statistician who has used this model. Thank you in advance! Guang Ying Mo PhD Candidate Department of Sociology University of Toronto 725 Spadina Ave. Toronto ON, M5S 2J4