The Effects of Immigrant Concentration on Changes in Neighborhood Crime Rates

Objectives

This study investigated the extent to which immigrant concentration is associated with reductions in neighborhood crime rates in the City of Los Angeles.

Methods

A potential outcomes model using two-stage least squares regression was estimated, where immigrant concentration levels in 1990 were used as an instrumental variable to predict immigrant concentration levels in 2000. The instrumental variables design was used to reduce selection bias in estimating the effect of immigrant concentration on changes in official crime rates between 2000 and 2005 for census tracts in the City of Los Angeles, holding constant other demographic variables and area-level fixed effects. Non-parametric smoothers were also employed in a two-stage least squares regression model to control for the potential influence of heterogeneity in immigrant concentration on changes in crime rates.

Results

The results indicate that greater predicted concentrations of immigrants in neighborhoods are linked to significant reductions in crime. The results are robust to a number of different model specifications.

Conclusions

The findings challenge traditional ecological perspectives that link immigrant settlement to higher rates of crime. Immigration settlement patterns appear to be associated with reducing the social burden of crime. Study conclusions are limited by the potential for omitted variables that may bias the observed relationship between immigrant concentration and neighborhood crime rates, and the use of only official crime data which may under report crimes committed against immigrants. Understanding whether immigrant concentration is an important dynamic of changing neighborhood patterns of crime outside Los Angeles will require replication with data from other U.S. cities.     

Adult-perpetrated animal abuse: development of a proclivity scale

There is a clear discrepancy in the reporting of animal cruelty complaints, prosecutions, and convictions suggesting that any prevalence figures of abuse are significant under-representations. Therefore, it can be inferred that there is a large number of animal abusers who are unapprehended. Currently there is no validated tool that assesses the proclivity or propensity to engage in animal abuse amongst members of the general public. Such a tool would enable researchers to study individuals who may think like animal abusers or may be unapprehended offenders themselves. This paper presents the newly developed Animal Abuse Proclivity Scale (AAPS) and some preliminary findings. The results from our two studies show that: (1) the psychometric properties of the AAPS indicate that the scale is a highly reliable measure; (2) the AAPS relates to measures assessing offence-supportive attitudes and reflects the gender differences seen in the literature; and (3) the AAPS demonstrates cross-national validity. These findings support that the AAPS, similar to other offending proclivity measures, is a tool that can be used to examine the factors most related to animal abuse propensity. We discuss how the AAPS can contribute to future developments in theory and practice in the field.     

Immigration,intermarriage and the changing face of Europe in the post war period

In this article we compare the propensity to intermarry of various migrant groups and their children who settled in Germany, France, England, Belgium and the Netherlands in the post-war period, using a wide range of available statistical data. We try to explain different intermarriage patterns within the framework of Alba and Nee's assimilation theory and pay special attention to the role of religion, colour and colonial background. We therefore compare colonial with non colonial migrants and within these categories between groups with ‘European’ (Christian) and non-European (Islam, Hinduism) religions. First of all, religion appears to be an important variable. Migrants whose faith has no tradition in Western Europe intermarry at a much lower rate than those whose religious backgrounds correspond with those that are common in the country of settlement. The rate of ethnic endogamous marriages in Western Europe are highest in Hindu and Muslim communities, often regardless if they came as guest workers or colonial migrants. Whereas differences in religion diminish the propensity to intermarry, colour or ‘racial’ differences on the other hand seem to be less important. This is largely explained by the pre-migration socialisation. Furthermore, the paper argues that the attention to institutions, as rightly advocated by Richard Alba and Victor Nee, needs a more refined and layered elaboration. Institutions, often as barriers to intermarriage, do not only emanate from the receiving society, but also—be it less formalized—within migrant communities. Especially religions and family systems, but also organized nationalist feelings, can have a profound influence on how migrants think about endogamy. Finally, strong pressures to assimilate, often through institutionalized forms of discrimination and stigmatization, not only produce isolation and frustrate assimilation (with resulting low intermarriage rates), but can also stimulate assimilation by 'passing' mechanisms. These factors, together with a more comparative perspective, are not completely ignored in the new assimilation theory, but—as this study of Western European intermarriage patterns stresses—deserve to be included more systematically in historical and social scientist analyses.     

Preadolescents' Perceptions of Females' Body Size and Shape: Evolutionary and Social Learning Perspectives

One hundred and sixty-five Mexican American and Euro-American preadolescents' and their parents' perceptions of healthy and attractive female body sizes and shapes were examined in this study. Participants' perceptions of healthy and attractive female figures were assessed using a pictorial measure that systematically manipulated 3 levels of body size and 4 levels of body shape (i.e., waist-to-hip ratio; WHR). All participants tended to perceive females' with small WHRs as most healthy and attractive looking, while preadolescents expressed a preference for thinner female figures than did adults. Results further suggest that Euro-American and Mexican American participants report similar preferences for females' body sizes and shapes. However, little agreement was found between preadolescents' and their parents' preferences. Principles of evolutionary theory and social learning theory are used to interpret these findings, and implications for preadolescents' perceptions of their own developing bodies, body image, and related eating behaviors are discussed.     

REGULATION OF ASBESTOS THE MICROANA1YTICS OF GOVERNMENT FAILURE

This article analyzes the government's role in regulating asbestos-related health hazards in the United States. The U.S. government has served as both promoter and regulator of the U.S. asbestos industry, and this article examines the extent to which—in both capacities—it has hindered rather than facilitated the information dissemination essential to voluntary assumption of asbestos related risks. In documenting the behavior of the major government actors, this paper investigates the political and economic forces that have shaped U.S. asbestos policy. It shows how the Congressional transition from promoter to regulator of the asbestos industry can be explained by the susceptibility of political processes to transaction-cost augmentation by the bureaucracy.     

Urban amenities,demand revelation,and the free-rider problem: A partial solution

This paper suggests a practical mechanism to mitigate problems of demand revelation and free riding that arise when efforts are made to create urban amenities such as parks or nature preserves through voluntary private purchase. Building on the work of earlier writers, the model provides a potential way to increase voluntary donations for local public goods, holding constant the incentive to free ride, while simultaneously introducing a mechanism — the refundable trust — that reduces the incentive to free ride. A case involving implementation of this mechanism is described.     

Informal interference in the judiciary in new democracies: a comparison of six African and Latin American cases

This article focuses on the efforts of power holders – at the executive or the legislative level – to influence or curb court activity informally or extra-legally, an acknowledged but under-researched topic in studies of judicial politics. We first define informal judicial interference and operationalize the concept; we then explain how we collected information on the topic through systematic cross-country interviewing. Our concept focuses on judicial intervention actions exercised by political actors once judges are on the bench. We distinguish these actions according to type – direct or subtle – and further differentiate each type according to six different modes. We provide new empirical data on informal interference in six third-wave democracies, three in Africa (Benin, Madagascar, and Senegal) and three in Latin America (Argentina, Chile, and Paraguay). Our empirical findings, first, confirm the importance of informal practices in shaping political-judicial relations. Second, they point to long-standing legacies and to the level of socio-economic development as possible explanations for different performances in terms of the prevalence and severity of informal interference in the judiciary in these newly established democratic regimes     

Determining the Method Threshold of Identification via Gas Chromatography–Mass Spectrometry of Weathered Gasoline Extracted from Burnt Nylon Carpet,

The Organization of Scientific Area Committees defines threshold of identification as the minimum concentration of ignitable liquid identifiable from gas chromatographic‐mass spectrometry data using accepted pattern identification criteria. We propose a method for determining this threshold for gasoline based on base peak to qualifier ratios of six compounds. The ion ratios were established for each compound in the neat gasoline. These ratios were then compared to those obtained for gasoline and 98% weathered gasoline both spiked onto burnt nylon carpet at 20 ppt down 0.50 ppt, and recovered from the carpet using headspace extraction (ASTM 1412). Identification was confirmed if the compounds’ ion ratios fell within ±25% of that in the neat sample. We found that ion ratios for all samples were acceptable for six compounds at 1.60 and 0.80 ppt for extracted neat and extracted 98% weathered gasoline, respectively, illustrating potential for incorporating into Quality Assurance Programs.     

Considering forensic science: individual differences,opposing expert testimony and juror decision making

Two experimental studies examined the effect of opposing expert testimony on perceptions of the reliability of unvalidated forensic evidence (anthropometric facial comparison). In the first study argument skill and epistemological sophistication were included as measures of individual differences, whereas study two included scores on the Forensic Evidence Evaluation Bias Scale. In both studies participants were assigned to groups who heard: (1) no expert testimony, (2) prosecution expert testimony, or (3) prosecution and opposing expert testimony. Opposing expert testimony affected verdict choice, but this effect was mediated by perceptions of reliability of the initial forensic expert's method. There was no evidence for an effect on verdict or reliability ratings by argument skill or epistemology. In the second experiment, the same mediation effect was found, however scores on one subscale from the FEEBS and age also affected both verdict and methodological reliability. It was concluded that opposing expert testimony may inform jurors, but perceptions of the reliability of forensic evidence affect verdict, and age and bias towards forensic science influence perceptions of forensic evidence. Future research should investigate individual differences that may affect perception or bias towards forensic sciences under varying conditions of scientific reliability.