GHETTOS,THRESHOLDS, AND CRIME: DOES CONCENTRATED POVERTY REALLY HAVE AN ACCELERATING INCREASING EFFECT ON CRIME?*

Theories make varying predictions regarding the functional form of the relationship between neighborhood poverty and crime rates, ranging from a diminishing positive effect, to a linear positive effect, to an exponentially increasing or even threshold effect. Nonetheless, surprisingly little empirical evidence exists testing this functional form. This study estimates the functional form of the relationship between poverty and various types of serious crime in a sample of census tracts for 25 cities, and it finds that a diminishing positive effect most appropriately characterizes this relationship whether estimating the models nonparametrically or parametrically. Only for the crime of murder does some evidence exist of an accelerating effect, although this occurs in the range of 20 to 40 percent in poverty, with a leveling effect on crime beyond this point of very high poverty. Thus, no evidence is found here in support of the postulate of scholars extending William Julius Wilson's (1987) insight that neighborhoods with very high levels of poverty will experience an exponentially higher rate of crime compared with other neighborhoods.     

What Types of School Capital Projects are Voters Willing to Support?

In many states, investments in school capital must be approved by bond referenda. Consequently, voter preferences can directly impact the quality of school facilities and their infrastructure. Researchers have often analyzed the causal mechanisms of referendum passage, but they have not examined whether the type of capital project affects the outcome of the referendum itself. In this paper, we use data from the state of Michigan to examine whether voters are willing to provide more or less support for specific types of capital investments. We focus on the relationship between voter support for maintenance versus the construction of a new building or additions to existing buildings. Our analysis suggests there is a higher approval rate for maintenance of existing facilities than the construction of new school buildings or additions.