"In the late 1970s and early 1980s, several important reviews of the literature failed to establish a clear consensus on the relationship between economic conditions and violent crime. The research presented here applies the procedures of meta-analysis to 34 aggregate data studies reporting on violent crime, poverty, and income inequality. These studies reported a total of 76 zero-order correlation coefficients for all measures of violent crime with either poverty or income inequality.
Of the 76 coefficients, all but 2, or 97 percent, were positive. Of the positive coefficients, nearly 80 percent were of at least moderate strength (>.25). It is concluded that poverty and income inequality are each associated with violent crime. The analysis, however, shows considerable variation in the estimated size of the relationships and suggests that homicide and assault may be more closely associated with poverty or income inequality than are rape and robbery.
Poverty, Income Inequality, and Violent Crime: A Meta-Analysis of Recent Aggregate Data Studies
"Starting from the 1970s, studies in the US pointed more and more at the link between unemployment, poverty and crime. After that other connections with income level, time spent at school, quality of neighborhood and education were revealed as well. Fresh research from the UK even indicates that economic cycles may affect variations in property and violent crimes.
But most importantly, what reveals the unmistakable connection between poverty and crime is that they’re both geographically concentrated - in a strikingly consistent way. In other words, where you find poverty is also where you find crime. Of course this doesn't include "softer" crimes such as corruption which causes massive damage to people's lives but in a more indirect type of violence."
Poverty and Crime: Breaking a Vicious Cycle of Discrimination
"Studies have shown that poverty and income are powerful predictors of homicide and violent crime. We hypothesized that the effect of the growing gap between the rich and poor is mediated through an undermining of social cohesion, or social capital, and that decreased social capital is in turn associated with increased firearm homicide and violent crime. Social capital was measured by the weighted responses to two items from the U.S. General Social Survey: the per capita density of membership in voluntary groups in each state; and the level of social trust, as gauged by the proportion of residents in each state who believed that “most people would take advantage of you if they got the chance”. Age-standardized firearm homicide rates for the years 1987–1991 and firearm robbery and assault incidence rates for years 1991–1994 were obtained for each of the 50 U.S. states. Income inequality was strongly correlated with firearm violent crime (firearm homicide, r=0.76) as well as the measures of social capital: per capita group membership (r=−0.40) and lack of social trust (r=0.73). In turn, both social trust (firearm homicide, r=0.83) and group membership (firearm homicide, r=−0.49) were associated with firearm violent crime. These relationships held when controlling for poverty and a proxy variable for access to firearms. The profound effects of income inequality and social capital, when controlling for other factors such as poverty and firearm availability, on firearm violent crime indicate that policies that address these broader, macro-social forces warrant serious consideration."
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