00538naa a2200169 a 450000100080000000500110000800800410001910000220006024500870008226000090016965000170017865300250019565300270022070000200024770000220026777300790028916575672010-02-10       2008    bl uuuu     u00u1 u    #d1 aSOUZA, G. da S. e  aEfficiency of Brazilian public and private water utilities.h[electronic resource]  c2008  awater supply  aEficiência de custo  aFronteira estocástica1 aFARIA, R. C. de1 aMOREIRA, T. B. S.  tEstudos Econômicos, São Paulogv. 38, n. 4, p. 905-917, out; /dez. 2008.