The 3 Arab Worlds (IMAGE) University of California - San Diego Caption UC San Diego economics professor James Rauch argues for grouping Arab countries into the three categories seen here in order to accurately analyze their socioeconomic development. Credit Courtesy of Doris Bittar. Usage Restrictions With credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.