Kirk Paul Lafler, consultant and founder of Software Intelligence Corporation, has been a SAS user since 1979. He received his BS and MS degrees from the University of Miami. As a SAS Certified Professional, Lafler provides IT consulting services and training to SAS users around the world. He is the author of several other books, including PROC SQL: Beyond the Basics Using SAS (2004) and Power AOL and Power SAS, as well as more than 500 papers and articles, and he is the recipient of nearly two dozen "best" contributed paper, hands-on workshop (HOW), and poster awards. Lafler is a frequent spe...