Dear SAS Community, I have recently run into a situation where my model requires a zero-one-inflated beta regression. I have applied the macros created by Christopher Swearingen, Maria Melguizo Castro, and Zoran Bursac in their paper 325-2012 from the SAS Global Forum in 2012 (https://support.sas.com/resources/papers/proceedings12/325-2012.pdf) but I have a question. The macro calls for: %Macro Beta_Regression(Dataset,tech,details,mu_vars,phi_vars,zero_vars,one_vars, depvar); with - Dataset – the LIBNAME.DATA file tech – allows for different optimization schemes to be used details – allows for other options to be specified mu_vars – variables modeling changes in mean phi_vars – variables modeling changes in precision zero_vars – variables predicting a response of zero one_vars – variables predicting a response of one depvar – the dependent variable scaled to a [0,1] interval I can't figure out what they are referring to with the "mu_vars" and "phi_vars" though. From what I can gather from the paper and from Ospina et. al this could be referring to continuous independent variables and categorical independent variables, respectively, in the model. Is this correct? Please explain as much as possible without jargon, I am not a statistician. Thank you very much in advance!! Mark
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