how to find cost auto variable in r which variable is the alternate specific variable in r r is using an auto vs. a rail variable? r what is the variable for auto? which model uses the rail variable only what is the utility of the choice variable in r model alternative specific variable which option is a cost variable in r where is the alternative specific variable in r located cost specific variable alternative explicit variable r alternative specific variable in r what is the alternative specific variable for r what is r alternative specific variable which variable is an alternative specific variable in r what is the alternative specific variable in r? what are alternative specific variables (alternative) alternative specific variable what is the alternative specific variable in r is rail an alternative variable?