Some rules of thumb e What types of variables are often used in log form? o Dollar amounts that must be positive Very large variables such as population o What types of variables are often used in level form? Variables measured in years o Variables that are a proportion or percent Economics 20- Prof anderson 7Economics 20 - Prof. Anderson 7 Some Rules of Thumb What types of variables are often used in log form? Dollar amounts that must be positive Very large variables, such as population What types of variables are often used in level form? Variables measured in years Variables that are a proportion or percent