Definition
Difference between a worker's wages (exchange value) and the value of goods and services he or she produces (use value). Since use value is (or should be) always higher than the exchange value, workers produce a positive surplus value through their labor. German philosopher-economist Karl Mark (1818-83) used surplus value as a measure of worker exploitation by capitalism.
Related Videos
http://www.businessdictionary.com/definition/surplus-value.html
