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Bounds in Competing Risks Models and the War on Cancer


Bo E. Honore


Princeton University - Department of Economics

Adriana Lleras-Muney


Princeton University - Woodrow Wilson School of Public and International Affairs; National Bureau of Economic Research (NBER)

December 2004

NBER Working Paper No. w10963

Abstract:     
In 1971 President Nixon declared war on cancer and increased the federal funds allocated to cancer research dramatically. Thirty years later, many have declared this war a failure. Overall cancer statistics confirm this view: age-adjusted mortality in 2000 was essentially unchanged from the early 1970s. At the same time, age-adjusted mortality rates from cardiovascular disease have fallen quite dramatically. Since the causes underlying cancer and cardiovascular disease are likely to be correlated, the decline in mortality rates from cardiovascular disease may be somewhat responsible for the rise in cancer mortality. It is natural to model mortality with more than one cause of death as a competing risks model. Such models are fundamentally unidentified, and it is therefore difficult to get a clear picture of the progress in cancer. This paper derives bounds for aspects of the underlying distributions under a number of different assumptions. Most importantly, we do not assume that the underlying risks are independent, and impose weak parametric assumptions in order to obtain identification. The theoretical contribution of the paper is to provide a framework to estimate competing risk models with interval data and discrete explanatory variables, both of which are common in empirical applications. We use our method to estimate changes in cancer and cardiovascular mortality since 1970. The estimated bounds for the effect of time on the duration until death for either cause are fairly tight and we find that trends in cancer show much larger improvements than previously estimated. For example, we find that time until death from cancer increased by about 10% for white males and 20% for white women.

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Date posted: December 19, 2004  

Suggested Citation

Honore, Bo E. and Lleras-Muney, Adriana, Bounds in Competing Risks Models and the War on Cancer (December 2004). NBER Working Paper No. w10963. Available at SSRN: http://ssrn.com/abstract=633624

Contact Information

Bo E. Honore
Princeton University - Department of Economics ( email )
Princeton, NJ 08544-1021
United States
Adriana Lleras-Muney (Contact Author)
Princeton University - Woodrow Wilson School of Public and International Affairs ( email )
Princeton University
Princeton, NJ 08544-1021
United States
National Bureau of Economic Research (NBER)
1050 Massachusetts Avenue
Cambridge, MA 02138
United States
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