Hi, I try beta regression model using "betareg". I have two questions: (i) The example data pratergrouped is not exist.> pratergrouped[1] V11 V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 <0 rows> (or 0-length row.names) (ii) In the description of betareg, it said variable, say y, is restricted in (0,1). Does this retriction be [0,1] (Kieschnick and McCullough, Statistical modeling 2003, 193-213)? Thanks for helps in advance. Cheers! Han