@inbook{publication-1870,
	address={Washington DC},
	author={Zweifel, Peter and Krey, Boris and Tagli, Maurizio},
	booktitle={Private voluntary health insurance in development: friend or foe?},
	doi={10.1596/978-0-8213-6619-6},
	editor={Preker, Alexander S and Scheffler, Richard M and Bassett, Mark C},
	isbn={978-0-8213-6619-6},
	pages={55-113},
	publisher={The World Bank / The International Bank for Reconstruction and Development},
	title={Supply of private voluntary health insurance in low-income countries},
	year=2007,
}