1. Cross-Level Inference;Achen,1995
2. Searching for the elusive aggregation effect: evidence from statistical simulations;Amrhein;Environ. Plan.,1996
3. The alchemy of statistics, or creating data where no data exist;Anselin;Ann. Assoc. Am. Geogr.,2000
4. Multilevel Analysis for Applied Research: It's Just Regression! (Methodology in the Social Sciences);Bickel,2007
5. Ecological effects in multi-level studies;Blakeley;J. Epidemiol. Commun. Health,2000