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252 Wayne E. Baker and Kenneth M. ColemanTable 11.1Black–white segregation and black isolation in top metropolitanareas in the United States (2000 census)Black–white Black–white Black Blacksegregation segregation isolation isolationArea index rank index rankDetroit, MI 85 1 79 1Milwaukee–Waukesha, WI 82 2 67 8New York, NY 82 3 60 18Chicago, IL 81 4 73 3Newark, NJ 80 5 67 9Cleveland–Lorain–Elyria, OH 77 6 71 6Cincinnati, OH–KY–IN 75 7 58 21Nassau–Suffolk, NY 74 8 41 41St Louis, MO–IL 74 9 65 12Miami, FL 74 10 62 17The index of residential segregation is also called the index of dissimilarity (D), defined asmeasuring “whether one particular group is distributed across census tracts in the metropolitanarea in the same way as another group. A high value indicates that the two groups tend to live indifferent tracts. D ranges from 0 to 100. A value of 60 (or above) is considered very high. It meansthat 60 percent (or more) of the members of one group would need to move to a different tract inorder for the two groups to be equally distributed. Values of 40 or 50 are considered a moderatelevel of segregation, and values of 30 or below are considered to be fairly low” (Lewis MumfordCenter for Comparative Urban and Regional Research, University of Albany athttp://mumford1.dyndns.org/cen2000/WholePop/CitySegdata/2622000City.htm). The MumfordCenter defines the isolation index as “the percentage of same-group population in the census tractwhere the average member of a racial/ethnic group lives. It has a lower bound of zero (for a verysmall group that is quite dispersed) to 100 (meaning that group members are entirely isolated fromother groups). It should be kept in mind that this index is affected by the size of the group – it isalmost inevitably smaller for smaller groups, and it is likely to rise over time if the group becomeslarger.”Source: Adapted from tables provided by the Lewis Mumford Center for Comparative Urban andRegional Research, University at Albany (2003)BASIC PATTERNS OF COMPUTER AND INTERNET USEIN THE DETROIT REGIONWe examined three indicators of computer and Internet usage – use of acomputer, use of the Internet, and, if the Internet is used, connection from