Background The costs of healthcare are on the rise. With an ageing population, growing demand for health services and expensive new technologies, Australia’s annual health care bill has more than doubled in the last ten years, and is projected to increase a further 127% by 2033. As third-party...

Network-based marketing refers to a collection of marketing techniquesthat take advantage of links between consumers to increase sales. Weconcentrate on the consumer networks formed using direct interactions(e.g., communications) between consumers. We survey the diverseliterature on such...