This study was undertaken to determine the ethnic and racial composition of corporations in Detroit, Michigan. The extent to which members of the Polish, Italian, Black, and Latino communities have penetrated the centers of power and influence in Detroit-based corporations was investigated. These groups comprise 33.8% of the Metropolitan Detroit population. The 100 largest Detroit corporations were identified. Four methods were used to determine the ethnic origin of the people occupying the positions under study: surname identification; a 50% individual questionnaire sample; research of existing biographical data; and a 100% phone survey. A comparison of the percentages of officers and directors whose backgrounds are Polish, Latino, Black, or Italian to the percentage distribution of these four groups in the Metropolitan population clearly shows an under representation of the four groups in Detroit's executive suites. Ninety percent of the 100 had no directors who were Polish. Only four corporations had any Black officers and the 15 Black directors represented 14 different corporations. Over 90 corporations had no Latino officers and only six of the 100 corporations had Latin directors. Although Italians had the more numerous representation of the four groups, 80 of the 100 corporations had no Italian directors and 78 had no Italian officers. The findings closely coincide with the findings of other studies and add to the national profile reflecting disparity in ethnic and racial representation in the corporate community. (Author/RM)