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Input Aggregation in Models of Data Envelopment Analysis: A Statistical Test with an Application to Indian Manufacturing
The author demonstrates how a statistical test proposed by Banker (1993) may be applied to test the validity of a specific way of aggregating several inputs. An empirical application using data from Indian manufacturing for the year 2002-03 is included as an example of the proposed test.
Link
http://www.econ.uconn.edu/working/2005-54.pdf