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Analyses based on population average and cluster specific models are commonly used for estimating treatment (exposure) effects with clustered data. This paper discusses conditions when one or both types of models are appropriate for estimating causal effects and when there is agreement between population average and cluster specific analyses. Applications of survey sampling methods to the robust estimation of standard errors of estimated treatment parameters are discussed.<\/jats:p>","DOI":"10.1002\/sim.4780130514","type":"journal-article","created":{"date-parts":[[2007,4,28]],"date-time":"2007-04-28T20:47:27Z","timestamp":1177793247000},"page":"509-522","source":"Crossref","is-referenced-by-count":56,"title":["Regression analysis with clustered data"],"prefix":"10.1002","volume":"13","author":[{"given":"Barry I.","family":"Graubard","sequence":"first","affiliation":[]},{"given":"Edward L.","family":"Korn","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2006,10,15]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.2307\/2530695"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/sim.4780110108"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.2307\/2530111"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.2307\/2531147"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1177\/096228029200100303"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1080\/10543409208835036"},{"key":"e_1_2_1_8_2","first-page":"117","article-title":"Regression analysis for sample surveys","volume":"37","author":"Fuller W. 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