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An absolute number, such as 10 lawyers, differs from a normalized number, such as 10 lawyers per billion of revenue. The bigger the law department, the larger the absolute numbers, whether of lawyers, internal spend, external spend, cases, office locations, library books or whatever. Small legal departments just don’t match up. However, if you divide the absolute numbers of departments of all sizes by revenue (or by employees, market capitalization, years in business, depreciation on hardware or some other figure they all have), departments of every size can compare themselves to each other on a similar quantitative footing. Both the top number (the numerator) and the bottom number it is divided by (the denominator) tend to grow or diminish in proportion. This technique of normalization allows benchmarking analysts to include law departments of vastly different sizes and yet produce their metrics on a comparable basis.