[amelia] Amelia question

Hello everyone Dr. King suggested I send this here. I just signed up to the list. I am looking forward to joining the conversation. I have three simple questions that did not become clear from the manual. When I set the polynomials, setting 0 means time will not be included in the model or time squared will not be included? For some odd reason I had a hard time getting the model to converge with time in there. (Unless I set priors of course.) Second, I am working in a multilevel modeling framework. I see the interact with cross-section option. Does this mean that all coefficients are allowed to vary across cross-sectional units ( which are countries in my case) or just the impact of time? If only the latter is true, what are the implication of using the multiply imputed data in a multilevel model where all variance components are estimated. This situation would mean that the imputation model is more restrictive then the analytical model. I thought the imputation model has to be the analysis model with possible inclusion of additional auxiliary variables. But I do not really know what happens when this is violated. And finally, can Amelia be used in non-longitudinal nested data situations? I guess this is tied in with the previous two questions. If time is not specified but cross-sectional index is, does the imputation model has the properties of a multilevel model where the relationships between the variables are allowed to vary across cross-sectional units? Thanks Levi Littvay University of Nebraska-Lincoln - Amelia mailing list served by Harvard-MIT Data Center [Un]Subscribe/View Archive: http://lists.gking.harvard.edu/?info=amelia