Lichty R (1997). “An Efficiency Analysis of Minnesota Counties: A Data Envelopment Analysis Using 1993 Implan Input-Output Analysis.” J Regional Analysis and Policy 27(1): 75-93.

Lichty R (1997). “An Efficiency Analysis of Minnesota Counties: A Data Envelopment Analysis Using 1993 Implan Input-Output Analysis.” J Regional Analysis and Policy 27(1): 75-93.

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