Lighting and Homicides: Evaluating the Effect of an Electrification Policy in Rural Brazil on Violent Crime Reduction

Introduction

This study estimates the effects of lighting on homicides in rural areas of developing countries.

Methods

We use an IV strategy by exploring the LUZ PARA TODOS or Light for All (LPT) program that was adopted by the federal government to expand electrification to rural areas in Brazilian municipalities in the 2000s as an exogenous source of variations in access to electricity.

Results

Our results indicate a significant decrease in homicide rates in municipalities the Northeast region, which is the poorest region of the country and most affected by the policy expansion. We estimate that helping a municipality increase from zero electricity coverage to full coverage reduces homicide rates by 92 per 100,000 inhabitants. This is equivalent to moving a municipality that is at the 99th percentile to the median (zero) of the crime distribution across municipalities. In addition, we perform placebo exercises using sub-samples of predominantly urban municipalities. The results increase our confidence in the IV strategy since our primary results were from areas with a larger percentage of rural population, as should be expected by the policy.

Conclusions

This study contributes to the extant literature by investigating the effects of lighting on homicides in a different context, rural areas of a developing country (Brazil).

     

Objective measurement of dental color for age estimation by spectroradiometry

Age-related changes in tooth color have been described previously, however, the use of dental color for age estimation in forensic odontology has been limited due to the difficulty of measuring color objectively. This study presents an objective method for determining dental color to estimate the age of an individual. Dentine color in 250 teeth from patients ranging in age from 10 to 89 years was determined by spectroradiometry. Color measurements were performed as suggested in the CIE 1931 (International Commission on Illumination). Chromaticity coordinates (x, y, z), luminance (Y), whiteness index (WIC, Z%, WIC) and yellowness index (YI) were obtained. Correlations between these colorimetric variables and aging were established by linear regression analyses. All the variables fit the mathematical model with correlation coefficients ranging from 0.53 to 0.75. This method of color measurement produced an expected associated error of calibration averaging 13.7 years about the mean estimated values, at a 70% level of confidence. Two different multiple regression models for dental age estimation were tested, and variables that made the greatest contributions to age calculation were identified. To determine the effect of postmortem interval on tooth color and its influence in age estimation, 37 teeth obtained from human skeletal remains buried during an interval ranging from 21 to 37 years were also studied. In this material, the correlation between age and dental color measured by spectroradiometry was weaker than in fresh extracted teeth.It is concluded that determination of dentine color by spectroradiometry is a potentially useful objective method to estimate age in forensic studies in combination with other methods.     

The social context of teenage childbearing: Effects on the infant's care-giving environment

The effects of maternal age and the social context on the home environment, and maternal behaviors of adolescent and older mothers, as well as the stability of the care-giving environment, were studied. Fifty low-middle socioeconomic status (SES), primiparous, Caucasian mothers and their fullterm healthy infants were included. At four months, support systems and life stress were assessed, as well as the home environment and maternal behaviors. At two years, a similar home visit was conducted in a subsample. Adolescent mothers had less education, lower SES, and a different child care support system. They also differed in the home environment and maternal behaviors at four months. Some of these differences disappeared when maternal education and SES, or child care support and life stress, were controlled. Moderate correlations were observed between four months and two years home environment and maternal verbalizations. Thus, a combination of maternal age and other social factors mediate the negative characteristics of the adolescent mother's care-giving environment, which is relatively stable during the infancy period.Received Ph. D. from Harvard University. Main research interests are sociocultural aspects of development, teenage pregnancy, and infant temperament.Received Ph. D. from University of California, Los Angeles. Main research interests are determinants of neonatal and infant development and statistical systems.Received Ph. D. from Brown University. Main research interests are mother-child interaction, and language acquisition in the hearing impaired.Received M. D. from the University of Santo Tomas, Manila, Philippines. Main research interests are both animal and human studies during the perinatal period.     

The Voting Rights Act and Hispanic Political Representation in the Southwest

Extensions of the Voting Rights Act (VRA) in 1970 and 1975 expandedcoverage to the southwestern United States and included provisionsfor non-English speaking minorities. In the South, the VRA hadthe effect of increasing the number of black voters and electedofficials. In this article, we examine the changes in numbersof Mexican American and other Hispanic elected officials inthe five southwestern states for federal, state, and local officesduring the eleven-year period of 1973–1984. Gains occurredduring the period, although they were uneven across the statesand for different types of offices. The VRA served to removethe more blatant obstacles to electoral participation, but thelaw's fullest impact has also required effective political mobilizationby Hispanic organizations to increase voter registration andproduce a conducive environment for Hispanics to seek and winelective positions.     

Security Versus Liberty in the Context of Counterterrorism: An Experimental Approach

A critical question in counterterrorism studies concerns the extent to which governments adequately balance the continual provision of individual rights and freedoms with the appropriate level of national security when faced with a terrorist attack. We experimentally assess this tradeoff utilizing a 2 × 2 × 2 between-groups factorial design, manipulating (a) the extent of terror-related threats, (b) the level of invasiveness of subsequent counterterrorism policies, as well as (c) the terror context: transnational and domestic. The results provide evidence that the public is more willing to accept greater reductions in civil liberties under a greater threat of terrorism only when the perceived effectiveness of those policies to prevent future acts of terrorism is high. Furthermore, we find these results to be specific to the context of a transnational terror threat. This suggests that the public will be unwilling to accept reductions in civil liberties when the source of the attack is domestic, regardless of the level of threat or how effective subsequent policies may be in preventing future attacks.     

Arms Transfers beyond the State-to-State Realm

Arms transfers beyond the state-to-state realm can have harmful effects for international security dramatically affecting the relations and behavior of states. This article examines why an emerging international norm on "prohibiting states to transfer arms to nonstate groups" has failed to diffuse at the international level. It discusses the already available international law framework existing at the regional and international levels upon which the potential norm could be built. The failure of the norm to diffuse at the international level can be primarily explained by the existence of a long-consolidated norm: the customary practice of states to transfer weapons to nonstate actors, that is, groups they deem legitimate to, without any interference or constraint. ¹ The unrestrained transfer of weapons is an established foreign-policy practice. It is the way states form, uphold alliances, extend friendships, and build spheres of influence ( Sorokin 1994 ). Clearly, no state willingly wants to give this up. Therefore, the multilateral agreement on a norm barring most or all transfers of weapons to nonstate actors would curtail the freedom of action to build spheres of influence as states please. There are genuine ethical and moral dilemmas in this discussion, a nonstate actor may be a freedom fighter or a terrorist depending on different perspectives. The distinction between the categories "state" and "nonstate" actors may risk classifying actors in two camps: the good and the bad, respectively. This is problematic as a few states are known to be the most brutal perpetrators of egregious violations against their own citizens, whereas certain nonstate actors are legitimately fighting for the protection of vulnerable populations.     

Mining against the State? Gold Mining and Emerging Notions of Territoriality in Southeastern Venezuela

The current economic crisis in Venezuela has drawn members of Pemón communities to the practice of informal (illegal) gold mining, as mining, undertaken alongside other ‘traditional’ economic activities, is a more effective source of income than waged jobs. The increased involvement of Pemón people in informal mining has encouraged their partial retreat from the state's frontiers, and it reveals transformations in the ways in which local people imagine and relate to the Venezuelan state. These transformations are embodied in both a reorganisation of the space, and in burgeoning notions of land ownership.     

Perceptions of the criminal justice system by minority and majority group university students: The role of ethnic identity

Minorities are overrepresented in the criminal justice system, and prior research has indicated ethnic minorities and Whites have different opinions of and different experiences within the system. While differences have been shown, the influence of ethnic identity on perceptions of the legal system has been overlooked. The purpose of the present research was to determine if there were differences in perceptions of the legal system by ethnic identity levels for ethnic minorities and Whites. Results indicated differences do exist and ethnic identity is a crucial issue in understanding resonance with the legal system. Future directions for incorporating ethnic identity in research on the criminal justice system are discussed.