Education system EEUU 1870-2011
Emergy Evaluation of Formal Education in the United States: 1870 to 2011
Daniel E. Campbell and Hongfang Lu
Abstract: We evaluated the education system of the United States from 1870 to 2011 using emergy methods. The system was partitioned into three subsystems (elementary, secondary and college/university education) and the emergy inputs required to support each subsystem were determined for every year over the period of analysis.