Information Aggregation and Optimal Structure of the Executive

We model two aspects of executives in parliamentary democracies: Decision‐making authority is assigned to individuals, and private information is aggregated through communication. When information is relevant to all policies and communication is private, all decisions should be centralized to a single politician. A government that holds cabinet meetings, where information is made available to all decision makers, outperforms one where communication is private: A multimember cabinet can be optimal; it need not be single peaked around the most moderate politician or ideologically connected. Centralization is nonmonotonic in the degree of ideological divergence. In a large cabinet, all power should be given to the most moderate politician. Even when uncertainty is policy specific and a single politician is informed on each policy, power should never be fully decentralized. Our model provides a justification for centralized authority and cabinet meetings that enhance the quality of policy.     

Robotic prostheses as products enhancing the rights of people with disabilities. Reconsidering the structure of liability rules

The term ‘robot’ refers to a wide variety of devices, serving very different purposes. The case of robotic prostheses is considered here. After defining such devices, and briefly describing the technical peculiarities that characterize their functioning and distinguish them from traditional implants, their relevance with respect to the fundamental rights of people with disabilities is considered. Pursuant to the United Nations Convention on the Rights of Persons with Disabilities, a claim is made that favouring the development of said applications may be required to subscribing states. In light of such considerations, the liability regime – namely that emerging from the Defective Product Directive – is analysed, in the attempt to determine – with a prospective analysis – the impact that said rules are likely to have on their development. The technology-chilling effect and the anticipated extremely complex evidentiary burden the user would have to face in order to obtain compensation lead us to conclude that legal reform is advisable. Some alternatives are considered, and in particular that of the development of a – partially – state-funded no-fault plan, intended to allow more ex ante certainty for producers and researchers (favouring the development of said devices), and prompt and adequate compensation to the victim in case an accident occurs.     

Nondestructive Methods for Recovery of Biological Material from Human Teeth for DNA Extraction

The extraction of DNA from human skeletal remains applied to forensic, and evolutionary studies do not exclude risks, which are to be evaluated when working with unique specimens that could be damaged or even destroyed. In the present study were evaluated several nondestructive methods for recovering DNA instead of the most currently used pulverization method. Three different procedures to access inside the dental pieces (occlusal perforation, cervical perforation, and cervical cut) have been compared with the aim of recovering as many cell remains as possible to carry out a DNA extraction. Given the DNA quantitation results, a method was proposed that consists of a cervical cut to facilitate the access to the pulp cavity and a subsequent filing of the root canals down to the apex of the dental root. This methodology allows the recovery of both mitochondrial and nuclear DNA, with the minimum deterioration for the dental pieces.     

Effects of Homeopathic Mother Tinctures on Breath Alcohol Testing

In some countries, it is illegal to drive with any detectable amount of alcohol in blood; in others, the legal limit is 0.5 g/L or lower. Recently, some defendants charged with driving under the influence of alcohol and have claimed that positive breath alcohol test results were due to the ingestion of homeopathic mother tinctures. These preparations are obtained by maceration, digestion, infusion, or decoction of herbal material in hydroalcoholic solvent. A series of tests were conducted to evaluate the alcoholic content of three homeopathic mother tinctures and their ability to produce inaccurate breath alcohol results. Nine of 30 subjects gave positive results (0.11–0.82 g/L) when tests were taken within 1 min after drinking mother tincture. All tests taken at least 15 min after the mother tincture consumption and resulted in alcohol-free readings. An observation period of 15–20 min prior to breath alcohol testing eliminates the possibility of false-positive results.