and work out customized payment plans ("convenios de pago") with the agents. The plans allow customers to catch up on missed payments over several months, so long as they pay the current month's fee—and they result in immediate restoration of water service. AAA also developed a program to reward customers who consistently pay their bill. The program, known as "Supercliente" (super customer) awards modest prizes and certificates to customers who stay on top of their bill. As a result, billing efficiency increased from 66% in 1996 to 87% in 2004. See also Public utilities in Colombia Further reading Barrera, Felipe, and Mauricio Olivera (2007). Does Society Win or Lose as a Result of Privatization? Provision of Public Services and Welfare of the Poor: The Case of Water Sector Privatization in Colombia, Research Network Working Paper #R-525, Latin American Research Network. Washington, D.C.: Inter-American Development Bank. References Colombia Government of Colombia Economy of Colombia Water supply and sanitation in Colombia Privatization in Colombia