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Smith, Ken R.; Waitzman, Norman J. | Double jeopardy: interaction effects of marital and poverty status on the risk of mortality | The purpose of this paper is to examine the hypothesis that marital and poverty status interact in their effects on mortality risks beyond their main effects. This study examines the epidemiological bases for applying an additive rather than a multiplicative specification when testing for interacti... | National Health and Nutrition Examination Survey | 1994 |