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The literature on the effects of campaign expenditures on electoral outcomes implicitly suggests that incumbent spending cannot have a negative marginal impact on the incumbent's vote share. Indeed, that literature has spent a great deal of effort finding positive and significant effects of incumbent spending. This paper shows that there are circumstances under which theory predicts zero and even negative impacts of incumbent spending. Estimating equations derived from the theory provide strong support for the base model, though only weak support for the extensions which predict nonpositive marginal products for incumbents. 相似文献
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Methyl ethyl ketone peroxide (MEKP) is a free radical-generating compound used as a fiberglass resin hardener. A 41-year-old Haitian man developed severe metabolic acidosis, hemolysis, esophageal and gastric necrosis, and perforation of the stomach after drinking an undetermined amount of MEKP in a successful suicide attempt. The biochemical effects of free radicals explain the necrosis and hemolysis observed. 相似文献
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Birgitte Mednick Charlotte Reznick Dennis Hocevar Robert Baker 《Journal of youth and adolescence》1987,16(1):31-45
The purpose of this study was to explore the long-term effects of parental divorce on young adult male crime from a longitudinal perspective. Four hundred and twenty-three males were randomly selected from a Danish birth cohort. Results of analyses of variance showed an initial significant relationship between divorce and young adult crime. However, the effects of divorce disappeared when further path analysis controlled for the effects of social class and father's criminality. In addition, time of divorce did not have an effect on later criminal behavior.Received her Ph.D. from Teachers College, Columbia University, in 1975. Current interests are interactions between biological and social variables.Received her Ph.D. from the University of Southern California in 1986. Current interests are social intervention and delivery of human services.Received his Ph.D. from Cornell University in 1974. Current interests are measurement, causal modeling, and individual differences.Received his Ph.D. from the University of Nebraska (Lincoln) in 1955. Current interests are learning, instructional development, and the development of human potential. 相似文献
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