Economies of scale and scope are typically modelled and estimated using cost functions that are common to all firms in an industry irrespective of whether they specialize in a single output or produce multiple outputs. We suggest an alternative flexible technology model that does not make this...

Past and present administrations have implemented water supply and sanitation (WSS) programs to increase the number of households with access to safe drinking water and sanitary toilet facilities. This study examines the President's Priority Program for Water and the Sagana at Ligtas na Tubig...