Indicators for Basic Geography
Manufacturing jobs reflect 2010 estimates. Estimates are gathered by place of work and reflect the number of jobs, not workers.
Manufacturing share of total employment reflects the share of total payroll employment, which does not include the self-employed.
Very high-tech and moderately high-tech manufacturing industries are designated as such because they have large shares of science and engineering occupations. To qualify as very high-tech, the share of science and engineering occupations within an industry must be at least five times the economy-wide national average. The threshold for moderately high tech industries is two times the national average.
Source: Brookings analysis of data supplied by Moody's Analytics and the Bureau of Labor Statistics' Occupational Employment Statistics survey (to determine industry technology level) for the year 2010.
Indicators for Industry Specialties
Industry specialization is a relative measure, defined as the metro area share of employment in a given industry divided by the national share of employment in that industry. We refer to this measure here as an index of the degree of specialization of an industry; it is also often called a location quotient.
A metropolitan area is considered to be strongly specialized in a manufacturing industry if it has an index of 1.05 or higher. Index values greater than 1.50 indicate very strong specializations and values greater than 1.90 indicate a highly specialized metro area.
Source: Brookings analysis of data supplied by Moody's Analytics
Indicators for Industry Patterns
Industry specialization groups are defined by an "anchor" industry or combination of industries, in which all metropolitan areas in the group are relatively strongly (usually highly) specialized, and by another industry in which all metropolitan areas in the group are less specialized.
The six "anchor" industries are computers and electronics, transportation equipment, low-wage manufacturing (including food, textiles, apparel, leather, wood, and furniture), chemicals, machinery, and food. These industries "anchor" the groups called Information Technology; Planes, Trains, Automobiles, and Ships; Low-Wage Manufacturing; Chemical Alley; the Machinery Belt; and Factories Near the Fields.
Of the metro areas that do not fall into these group, nearly all have diversified manufacturing employment that is spread out among many industries, while a few have idiosyncratic patterns of specialization. These metro areas make up the remaining two groups presented in this section.
Source: Brookings analysis of data supplied by Moody's Analytics for the year 2010
Indicators for Wage Variations
The wage data presented here represent average annual earnings per job for the year 2010.
Users should take caution in interpreting wages for metro areas outside of the 100 largest metro areas. This is due to data quality in the smaller metro areas; in several cases, industries with few employees, but extremely high average earning skewed overall estimates. This is why we do not present data for the very high-tech and moderately high-tech aggregates for the smaller metro areas.
Source: Brookings analysis of data supplied by Moody's Analytics for the year 2010
Indicators for Plant Size Variations
Average plant size is defined as total employment divided by the number of business establishments in a metro area.
In some cases, the source data for this indicator have been suppressed; in these cases we create an estimate using the midpoint of a range, which is usually specified in the source data in cases of suppression. Note that data are missing for three metro areas.
Source: Brookings analysis of data supplied by the Census Bureau's County Business Patterns for 2009
Indicators for Job Changes
This section presents percent change in manufacturing jobs for three distinct time periods: 1980 to 2000, 2000 to 2010, and from the first quarter of 2010 to the fourth quarter of 2011 (rates are not annualized).
Source: Brookings analysis of data supplied by Moody's Analytics
Indicators for Urban Location
This section distinguishes between job growth in the central and outlying counties of metropolitan areas. Central counties are those containing principal cities of metropolitan areas; outlying counties are all remaining metro area counties. Our analysis is restricted to metropolitan areas with three or more counties.
This section presents percent change in manufacturing jobs for two time periods: 1980 to 2000 and 2000 to 2010 (the last year for which county level data are available). Rates are not annualized.
Source: Brookings analysis of data supplied by Moody's Analytics