wholesale 888 jewelry How to define virtual variables in stata

wholesale 888 jewelry This defines a virtual variable ROSNEG, which is equal to 1 at ROS u003C0, and at ROS> = 0 equal to 0. Essence Essence How to write the program language. Essence Essence ROS is an existing variable in the data set. Essence Essence Essence ~~~~ (> _ u003C) ~~~~ I took the exam the day after tomorrow. Essence Essence