1. Bourguignon F., Chakravarty, S.R., 1998. The Measurement of Multidimensional Poverty. Draft manuscript. Ecole des Hautes Etudes en Sciences Sociales and DELTA. Document number 98-12, Paris, July, p. 32.
2. United States Environmental Protection Agency (EPA), 1984. Costs and Benefits of Reducing Lead in Gasoline: Final Regulatory Impact Analysis. EPA-230-05-85-006. Office of Policy Analysis. Washington, DC, February.
3. EPA, 1994. Measuring Air Quality: The Pollutant Standards Index. EPA 451/K-94-001. Office of Air Quality Planning and Standards, Research Triangle Park, NC, February.
4. EPA, 1997. The Benefits and Costs of the Clean Air Act, 1970–1990. Office of Air and Radiation, October.
5. EPA, 1998. National Air Quality and Emissions Trends Report, 1997. EPA 454/R-98-016. Office of Air Quality Planning and Standards, Research Triangle Park, NC, December.