Use and Abuse of Weights in Multiple Objective Decision Support Models*

This paper examines difficulties with the use of weights to solve multiple objective decision support models: misunderstanding of the meaning of weights, issues of commensurability and, most important, the likely inability of weights alone to isolate the decision maker's most-preferred point. The constraint method is shown to be an attractive alternative.     

Poverty in Nonmetropolitan America: Impacts of Industrial,Employment, and Family Structure Variables

Abstract Poverty is more extensive and more severe in nonmetropolitan areas than in metropolitan areas. Here we maintain that the extensive industrial and economic transformations occurring in rural areas have resulted in patterns contributing to these high poverty levels. These transformations, which include an increase in service‐sector employment, in many ways mirror the economic changes that have occurred in the inner city. We maintain that Wilson's model of the inner‐city underclass can be useful in understanding some poverty trends in nonmetropolitan areas. To test the Wilson model, we analyze 1990 census data. The data generally support the model and indicate that the industrial transformation of rural areas leads to changes in the gender structure of the labor force, and to a more unbalanced sex ratio. These changes, in turn, result in adjustments to family structure, including an increase in the percentage of female‐headed households. This process results in higher poverty levels.     

Post-neonatal mortality in Rural India: Implications of an economic model

In this paper we develop and test a theory of childhood mortality after the first month of life. Parents are assumed to have well-defined family size and sex composition objectives and to face severe budget constraints. In this set of circumstances, it is understandable that they will make allocative decisions that will affect the survival probabilities of children. These decisions and the environmental influences on mortality are the basic forces which determine whether a child will survive through the post-neonatal period. The model is tested with survey data from rural Uttar Pradesh, India. The results are consistent with the hypothetical framework discussed above. The burden of this pattern of choice is felt particularly strongly by female births.     

Opportunity/Threat Responses to Nuclear Waste Disposal Facilities1

One of the most difficult environmental policy challenges facing the United States and other societies is that of finding ways to safely dispose of hazardous and toxic substances, including nuclear waste materials. Efforts to site such facilities have been uniformly unsuccessful, due largely to strong public opposition. Although supporters of such facilities often emphasize the potential for local economic development and other opportunities, opponents focus on a variety of threats involving potential risks associated with waste disposal. Survey data collected in rural areas of Nevada and Nebraska where nuclear waste disposal facilities have been proposed reveal that respondents' positions on issues of perceived health and safety risks, trust in responsible agencies, anticipated local economic effects, and concerns about environmental contamination are key variables predicting local response. Even in areas where there may be substantial local support for economic opportunities associated with the facilities, broad-based fears about nuclear materials and a legacy of distrust in the agencies responsible for managing nuclear wastes suggest that proposals for such facilities will almost inevitably continue to generate strong public opposition.     

Family Structure Among Urban,Rural and Farm Populations: Classic Sociological Theory Revisited

Abstract As predicted by the classic sociological theories of Durkheim, Tonnies, and others, early sociological researchers found extensive differences between urban and rural residents in the United States. In recent decades, many of these differences have appeared to wane, or in some cases, totally disappear. Based on these classic theories, we maintain that many of the urban/rural differences found in the past were actually farm/nonfarm differences. Further, we argue that many of these differences continue to exist in rural America, but they have been suppressed by major demographic transitions. Utilizing Current Population Survey data on family structure, we found that there were few significant differences between urban and rural nonfarm residents, but both varied extensively from various segments of the farm population.     

Evaluation of statistical equivalence using limits of agreement and associated sample size calculation *

In this article, the Food and Drug Administration's (FDA) medical device substantial equivalence provision will be briefly introduced and some statistical methods useful for evaluating device equivalence are discussed. A sample size formula is derived for limits of agreement, which may be used to assess statistical equivalence in certain medical device situations. Simulation findings on the formula are presented, which can be used to guide sample size selections in common practical situations. Examples of the sample size procedure are given.