Hi all, I am trying to develop some model estimating technical efficiency. I can use Cobb-Douglas function and translog production function, both using PROC QLIM. I want to build another model for technical efficiency - the quantile model. I found multiple papers on how to use quantile regression in SAS (PROC QUANTREG, QUANTSELECT...) but none was focused on quantile regression for calculation technical efficiency (not only calculating the prediction of the target variable but also calculation the score of technical efficiency). Any SAS users here experienced with it?   Thank you, Tomas ... View more

Hi, I am trying to build the decision tree model. Based on help I have found (http://support.sas.com/resources/papers/proceedings15/SAS1940-2015.pdf, or http://support.sas.com/documentation/cdl/en/stathpug/68163/HTML/default/viewer.htm#stathpug_hpsplit_gettingstarted.htm) I try to learn the procedure.   Using the example "Wine" (syntaxe above in the second link) SAS returns notification about the error: "ERROR: Regression trees (interval target) can only use VARIANCE and FTEST criteria". But my target variable (class) is nominal type, expressed by number (1, 2, and 3).   Can anybody help me to solve it?   Thank you, Tomas   ... View more