There are, of course, many different ways to create more-advanced and sophisticated scripts, notably including shell script functions, but we'll delve into those as we proceed. I'm a big fan of just ...

THEODORE R. CURRY, ALEX R. PIQUERO, CONTROL RATIOS AND DEFIANT ACTS OF DEVIANCE: ASSESSING ADDITIVE AND CONDITIONAL EFFECTS WITH CONSTRAINTS AND IMPULSIVITY, Sociological Perspectives, Vol. 46, No. 3 ...