The Bottom Line: The Effect of Written Expert Witness Statements on Juror Verdicts and Information Processing

Mock jurors recruited from jury rolls were either not given written statements of expert witnesses' direct testimony or were provided with such statements before or after the presentation of that testimony. Presentation of the statements before the testimony and cross-examination provided jurors with a schema that allowed them to distinguish more effectively among the claims of four differentially worthy plaintiffs because they processed more probative evidence than other jurors. Jurors in receipt of written statements before the testimony found the evidence to be more comprehensible than other jurors. Jurors provided with written statements following testimony and cross-examination were able to differentiate between the most and least severely injured plaintiffs, whereas jurors not in receipt of any written statements were unable to differentiate among any of the differentially worthy claimants. The limitations of this case management technique and of the study are discussed.     

How the Framework of Implementation Science Guided an Evidence‐Based Dependency Parenting Program Initiative in Florida

In Florida, like most states, many of the parenting programs that are being utilized with families in the dependency system are non‐evidence based, and fail to provide quantifiable data on parent progress during and after completion of the programs. Providing pertinent information in court on parents’ progress in a parenting program, as opposed to simply monitoring attendance, is a growing need voiced by dependency judges and child welfare case management professionals. Clear, reliable information related to parenting skills acquisition and insight can help to ensure that families involved in the child welfare system have access to quality services that improve outcomes for their children. The purpose of this paper is to detail how a statewide initiative to increase the number of Florida circuits providing evidence‐based parenting programs to their clients utilized implementation science to guide their process, and the degree to which the participating circuits achieved full implementation of evidence‐based parenting programs.     

Police,Crime and the Problem of Weak Instruments: Revisiting the “More Police,Less Crime” Thesis

Objectives

A key question in the general deterrence literature has been the extent to which the police reduce crime. Definitive answers to this statement, however, are difficult to come by because while more police may reduce crime, higher crime rates may also increase police levels, by triggering the hiring of more police. One way to help overcome this problem is through the use of instrumental variables (IV). Levitt, for example, has employed instrumental variables regression procedures, using mayoral and gubernatorial election cycles and firefighter hiring as instruments for police strength, to address the potential endogeneity of police levels in structural equations of crime due to simultaneity bias.

Methods

We assess the validity and reliability of the instruments used by Levitt for police hiring using recently-developed specification tests for instruments. We apply these tests to both Levitt’s original panel dataset of 59 US cities covering the period 1970–1992 and an extended version of the panel with data through 2008.

Results

Results indicate that election cycles and firefighter hiring are “weak instruments”—weak predictors of police growth that, if used as instruments in an IV estimation, are prone to result in an unreliable estimate of the impact of police levels on crime.

Conclusions

Levitt’s preferred instruments for police levels—mayoral and gubernatorial election cycles and firefighter hiring—are weak instruments by current econometric standards and thus cannot be used to address the potential endogeneity of police in crime equations.

     

Strategic Defiance and Compliance in the U.S. Courts of Appeals

Why do lower courts treat Supreme Court precedents favorably or unfavorably? To address this question, we formulate a theoretical framework based on current principal‐agent models of the judiciary. We use the framework to structure an empirical analysis of a random sample of 500 Supreme Court cases, yielding over 10,000 subsequent treatments in the U.S. Courts of Appeals. When the contemporary Supreme Court is ideologically estranged from the enacting Supreme Court, lower courts treat precedent much more harshly. Controlling for the ideological distance between the enacting and contemporary Supreme Courts, the preferences of the contemporary lower court itself are unrelated to its behavior. Hence, hierarchical control appears strong and effective. At the same time, however, a lower court's previous treatments of precedent strongly influence its later treatments. The results have important implications for understanding legal change and suggest new directions for judicial principal‐agency theory.     

Bounded rationality of identity thieves: Using offender‐based research to inform policy*

Research Summary Data for this study were collected in semistructured interviews with 59 individuals serving time in federal prisons for identity theft. We explore how offenders' experiences and life circumstances affected their subjective assessments of risks and rewards and thus facilitated the decision to engage in identity theft. Our findings suggest that offenders perceive identity theft as an easy, rewarding, and relatively risk‐free way to fund their chosen lifestyles. Policy Implications The findings suggest that several situational crime‐prevention measures may be effective at curbing identity theft. Crime‐prevention programs that are geared toward removing excuses and advertising consequences may be effective in deterring potential offenders. We also recommend that rehabilitation programs for convicted identity thieves be cognitive‐based interventions aimed at changing the way offenders think about their crimes.     

The Application of Remote Sensing for Detecting Mass Graves: An Experimental Animal Case Study from Costa Rica*

Abstract: Detection of mass graves utilizing the hyperspectral information in airborne or satellite imagery is an untested application of remote sensing technology. We examined the in situ spectral reflectance of an experimental animal mass grave in a tropical moist forest environment and compared it to an identically constructed false grave which was refilled with soil, but contained no cattle carcasses over the course of a 16‐month period. The separability of the in situ reflectance spectra was examined with a combination of feature selection and five different nonparametric pattern classifiers. We also scaled up the analysis to examine the spectral signature of the same experimental mass grave from an air‐borne hyperspectral image collected 1 month following burial. Our results indicate that at both scales (in situ and airborne), the experimental grave had a spectral signature that was distinct and therefore detectable from the false grave. In addition, we observed that vegetation regeneration was severely inhibited over the mass grave containing cattle carcasses for up to a period of 16 months. This experimental study has demonstrated the real utility of airborne hyperspectral imagery for the detection of a relatively small mass grave (5 m²) within a specific climatic zone. Other climatic zones will require similar actualistic modeling studies, but it is clear that the applications of this technology provide the international community with both an early detection tool and a tool for ongoing monitoring.