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Column Name: manval Span: 1920-1997 Units: 1920-1947: Dollars; 1958: Thousands of dollars; 1972-1997: Millions of dollars Format: 1920-1958: Integer; 1972-1997: Floating point – one decimal place  Value
added by manufacturingValue added by manufacture indicates the approximate value created in the process of manufacture (i.e. the contribution of manufacturing establishments to the value of finished manufactured products). Value added is computed by subtracting the sum of the cost of materials, supplies, containers, fuels, purchased electricity, and contract work from the total value of products. Source (where directly obtained): Haines, Michael R., and the Inter-university Consortium for Political and Social Research. Historical, Demographic, Economic, and Social Data: The United States, 1790-2000, Database 2896. Hamilton, NY: Colgate University/Ann Arbor, MI: Inter-university Consortium for Political and Social Research [producers], 2004. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2005. http://www.icpsr.umich.edu Original Source: -U.S. Bureau of the Census. Fourteenth Decennial Census of the United States, 1920. Volume VIII, Manufactures: 1919. Washington, D.C.: Government Printing Office, 1923. -U.S. Bureau of the Census. Fifteenth Decennial Census of the United States, 1930. Manufactures: 1929, Volume III. Washington, D.C.: Government Printing Office, 1933. -U.S. Bureau of the Census. Sixteenth Decennial Census of the United States, 1940. Manufactures: 1939, Volume III. Washington, D.C.: Government Printing Office, 1942. -U.S. Bureau of the Census. County and City Data Book, 1952 (A Statistical Abstract Supplement). Washington D.C.: Government Printing Office, 1953.  Value added by manufacture is derived by subtracting the total cost of materials (including raw materials, supplies, fuel, electric energy, cost of resales and miscellaneous receipts) from the value of shipments (including resales) and other receipts, and adjusting the resulting amount by the net change in finished products and work-in-process inventories between the beginning and end of the year. Value added avoids the duplication in the figure for value of shipments that results from the use of products of some establishments as materials by others, and is considered to be the best value measure available for comparing the relative economic importance of manufacturing among industries and geographic areas. Source (where directly obtained): Haines, Michael R., and the Inter-university Consortium for Political and Social Research. Historical, Demographic, Economic, and Social Data: The United States, 1790-2000, Database 2896. Hamilton, NY: Colgate University/Ann Arbor, MI: Inter-university Consortium for Political and Social Research [producers], 2004. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2005. http://www.icpsr.umich.edu
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