Comprising 15.6% of the city population and 8.7% of the metropolitan area population in 1979, Hispanics are becoming a major segment of the labor force in Chicago. Based on ethnic composition data for 163 area elementary schools in 1970 and 1979, numbers of Mexicans and South and Central Americans are rising while the population of Puerto Ricans and Cubans is declining. Black and white populations are declining as well, suggesting a decrease in the unskilled labor force in the area. Chicago Hispanics have settled in five major industrial areas previously occupied by residents of Slavic background: East Humboldt Park, Pilsen, South Chicago/South Deering, Lakeview, and the Roosevelt and Western area. In addition, Hispanics have settled on the North side, east of the Chicago River. A larger concentration of Mexicans exists south of Madison Avenue; to the north is a mixture of Hispanic groups. As more companies need to tap this increasing segment of the labor market, the behavior characteristics of Hispanics in the work place will become significant in the areas of recruitment, screening and selection, training, motivation, and supervision. Hispanics and non-Hispanics differ in their response to authority, structuring behavior, and motivation attempts. (SB)