Metrics vary depending upon the needs of companies. While value and real value data can be useful for many purposes -- linking company data to market size data, many companies measure market size by physical factors. Companies selling tooth paste may measure demand by potential customer base and age profiles as well as income strata.
In the past employment data has been sold to most of the major high technology companies on the understanding that they use employment data as a proxy for number of potential units. Penetration rates can be developed for equipment by type of industries and then linked to the growth in employment expected.
Many companies also try to identify markets by splitting company detail by company size brackets. Sales of equipment may vary depending upon the number of employees in the company with smaller servers and desk computrs tied to small companies, and more advanced, mainframe computers and industrial strength servers to larger ones.
QuERI models employment size splits for individual industries and countries. The information is based on collected national data as well as a uniform, but sometimes less detailed, set of data collected by the OECD. Using cross-country models missing data can be filled in as well as estimates made for countries not reporting employment splits by size brackets.
Employment is based on ILO and UNIDO data linked to production data. Models are used to fill in missing data points. Employment models relate growth in employment to changes in productivity. Productivity is tied closely to capital stock, wages, and industry size and structure.
Employment and Company Size
Global Economic Databases
History & Forecasts - Project Consulting