Antipoverty Transfers and Labour Market Outcomes: Regression Discontinuity Design Findings

The article estimates the impact of Familias en Acción, a human development conditional cash transfer programme, on adult labour market outcomes in urban areas in Colombia. Relying on a regression discontinuity design and a large panel dataset, the article finds significant, largely positive, but heterogeneous programme effects on labour market outcomes. The findings suggest that antipoverty transfers enable a re-allocation of household productive resources among participant households.     

Multimodal biometrics for identity documents (MBioID)

The MBioID initiative has been set up to address the following germane question: What and how biometric technologies could be deployed in identity documents in the foreseeable future? This research effort proposes to look at current and future practices and systems of establishing and using biometric identity documents (IDs) and evaluate their effectiveness in large-scale developments. The first objective of the MBioID project is to present a review document establishing the current state-of-the-art related to the use of multimodal biometrics in an IDs application. This research report gives the main definitions, properties and the framework of use related to biometrics, an overview of the main standards developed in the biometric industry and standardisation organisations to ensure interoperability, as well as some of the legal framework and the issues associated to biometrics such as privacy and personal data protection. The state-of-the-art in terms of technological development is also summarised for a range of single biometric modalities (2D and 3D face, fingerprint, iris, on-line signature and speech), chosen according to ICAO recommendations and availabilities, and for various multimodal approaches. This paper gives a summary of the main elements of that report. The second objective of the MBioID project is to propose relevant acquisition and evaluation protocols for a large-scale deployment of biometric IDs. Combined with the protocols, a multimodal database will be acquired in a realistic way, in order to be as close as possible to a real biometric IDs deployment. In this paper, the issues and solutions related to the acquisition setup are briefly presented.     

Informing the judgments of fingerprint analysts using quality metric and statistical assessment tools

The aim of this research was to evaluate how fingerprint analysts would incorporate information from newly developed tools into their decision making processes. Specifically, we assessed effects using the following: (1) a quality tool to aid in the assessment of the clarity of the friction ridge details, (2) a statistical tool to provide likelihood ratios representing the strength of the corresponding features between compared fingerprints, and (3) consensus information from a group of trained fingerprint experts. The measured variables for the effect on examiner performance were the accuracy and reproducibility of the conclusions against the ground truth (including the impact on error rates) and the analyst accuracy and variation for feature selection and comparison. The results showed that participants using the consensus information from other fingerprint experts demonstrated more consistency and accuracy in minutiae selection. They also demonstrated higher accuracy, sensitivity, and specificity in the decisions reported. The quality tool also affected minutiae selection (which, in turn, had limited influence on the reported decisions); the statistical tool did not appear to influence the reported decisions.     

Computation of likelihood ratios in fingerprint identification for configurations of three minutiae

Recent challenges to fingerprint evidence have brought forward the need for peer-reviewed scientific publications to support the evidential value assessment of fingerprint. This paper proposes some research directions to gather statistical knowledge of the within-source and between-sources variability of configurations of three minutiae on fingermarks and fingerprints. This paper proposes the use of the likelihood ratio (LR) approach to assess the value of fingerprint evidence. The model explores the statistical contribution of configurations of three minutiae using Tippett plots and related measures to assess the quality of the system. Features vectors used for statistical analysis have been obtained following a preprocessing step based on Gabor filtering and image processing to extract minutia position, type, and direction. Spatial relationships have been coded using Delaunay triangulation. The metric, used to assess similarity between two feature vectors is based on an Euclidean distance measure. The within-source variability has been estimated using a sample of 216 fingerprints from four fingers (two donors). Between-sources variability takes advantage of a database of 818 ulnar loops from randomly selected males. The results show that the data-driven approach adopted here is robust. The magnitude of LRs obtained under the prosecution and defense propositions stresses upon the major evidential contribution that small portions of fingermark, containing three minutiae, can provide regardless of its position on the general pattern.     

Comparison of ethanol concentrations in right cardiac blood, left cardiac blood and peripheral blood in a series of 30 cases

The aim of this study was to compare ethanol concentrations in right cardiac blood, left cardiac blood and peripheral blood. Samples were taken from a series of 30 medicolegal autopsies. Ethanol was measured by headspace GC-FID. In each case, the degree of putrefaction, chest or abdominal injury, and/or regurgitation of gastric contents into the airways were noted. Our results show that there exists in certain cases a marked increase in ethanol concentration in left cardiac blood compared with right cardiac blood and peripheral blood. In these cases, we observed (i) a high concentration of ethanol in the gastric contents and (ii) regurgitation of gastric contents into the airways. The authors discuss the post-mortem redistribution mechanisms which could explain these results and stress the value of sampling right cardiac blood at autopsy.     

Interpreting small quantities of DNA: the hierarchy of propositions and the use of Bayesian networks

The dramatic increase in the sensitivity of DNA profiling systems that has occurred over recent years has led to the need to address a wider range of interpretational problems in forensic science. The issues surrounding questions of the kind "whose DNA is this?" have been the subject of considerable controversy but now it is clear that the emphasis is shifting to questions of the kind "how did this DNA get here?" Such issues are discussed in this paper and new insights are provided by two particular recent developments. First, the notion of the "hierarchy of propositions" that has arisen from a project called Case Assessment and Interpretation (CAI) that has been running in the British Forensic Science Service (FSS). Second, a technique for drawing inferences in the face of many interacting considerations, known as "Bayesian networks"--or "Bayes' nets" for short--that has been the subject of an earlier paper in this journal (1). The discussion is carried out by means of case studies, based on actual cases. It is clear that, whereas the inference in relation to the source of the DNA in a crime sample might be overwhelmingly strong, the inference in relation to the propositions that a jury must consider relating to the identity of the actual offender may be much more tentative.     

Coordination for traceability in the food chain. A critical appraisal of European regulation

Risk management has become a central issue in sanitary crises. Agro food firms have devised organizational responses to sanitary risks, usually implying better traceability. European Regulation 178/2002 established mandatory traceability. This paper provides a critical appraisal of the European Regulation on traceability. The analysis characterizes the mandatory traceability established and evaluates whether the information provided facilitates the withdrawal of targeted products promised by the European Regulation. It demonstrates the importance of traceability practices and sets out the responsibilities of food business operators as defined in the regulation. This regulation is seen as creating economic incentives for more stringent traceability. The problem of private operators’ coordination in relation to traceability practices is explained and the question of whether this problem can be solved by the strict application of European Regulation 178/2002 is addressed. The limits of the European Regulation in this context are demonstrated and solutions are proposed.

Coexistence of Subdural Hematoma and a Rare Cardiopathy in an Infant: Etiological and French Medicolegal Discussion

During legal proceedings following the unexpected death of an infant, the magistrate calls on an expert to clarify the causes of death and to decide on the course to be taken. A report was made following the death of a 7‐month‐old baby girl after recovery from cardiac arrest when investigations of the cause revealed a subdural hematoma (SDH). We discuss the interconnection of these two entities and their role in the lethal process. In this infant, two distinct lesions with medicolegal implications were simultaneously present: on the one hand histiocytoid cardiopathy, and on the other hand SDH, which could result from ill‐treatment. The case of this infant reminds us that the role of the pediatrician is to report the suspicion, whereas the role of the medical expert is to inform the magistrate as to the reality of abuse and its implication in the lethal process.     

Thinking alike: two pathways to leadership-candidate opinion congruence

This paper seeks to explain why party candidates and their party leadership have congruent policy positions or not. Despite its importance as a way through which parties are able to behave as a unitary actor, this congruence has never been studied as a dependent variable. We seek to fill this void in the literature. Our results suggest that leadership-candidate congruence comes about through two mechanisms: selection and learning. With selection, the party leadership aims to get those candidates elected whose policy preferences are congruent with the party line. Learning occurs through the process of socialization in which candidates assume the views of the party they work and candidate for as their own under. This happens under the pressure of cognitive dissonance. If a candidate learns about the position of the leadership and notices that they are incongruent, they may feel discomfort and change their opinion to be congruent with the party.     

Stature Estimation from Postmortem CT Femoral Maximum Length in Contemporary Danish Population

Stature estimation methods for Danish adult population have generally relied on Trotter and Gleser’s and Boldsen’s regression equations that are based on the skeletal remains of recent war dead American Whites, Terry Skeletal Collection, and Danish archaeological medieval skeletal materials, respectively. These equations are probably not suitable for stature estimation in contemporary Danish forensic cases. Furthermore, because postmortem computed tomography (PMCT) is now routinely performed at Danish forensic departments, equations based on PMCT, rather than measurements of defleshed bones, are needed. The aim of this study was to develop new equations for adult stature estimation based on PMCT femoral measurement. Maximum femoral length was measured on the PMCT images of 78 individuals (41 males and 37 females) aged 23–45 years. The measurement accuracy was tested on dry bones, and all the measurements were included in the inter- and intra-observer analyses. Both analyses results demonstrated the reliability of the method and data. Comparison between the living stature of the individuals and the estimates based on the equations by Trotter and Gleser and Boldsen demonstrated the unreliability of the previous equations to some extent. New regression equations were then developed and validated on a different sample of 18 Danish forensic cases. Comparisons of all the equations indicated that both the sets of previous equations underestimated the stature in the new validation dataset. The new equations developed in this study provide a reliable alternative for stature estimation in modern Danish forensic cases.