Surplus labour and economic efficiency in the traditional sector of a dual economy: The Guatemalan case

In this paper we present empirical evidence on two closely related and widely discussed theoretical issues in development economics:

(A) the sign and the magnitude of the marginal productivity of labour—as they relate to the existence of surplus labour in the traditional sector of dual economies, and

(B) the economic efficiency of farmers in traditional agriculture. With regard to (A) we found the marginal productivity of labour in the traditional sector of Guatemalan agriculture to be positive, but considerably lower than the average wage rate that prevails in the area. Regarding (B) our estimated indexes of efficiency indicate that farmers in the traditional sector of Guatemalan agriculture make inefficient use of their economic resources.     

The intifada: Two assessments

Zeev Schiff and Ehud Ya'ari, Intifada: The Palestinian Uprising ‐ Israel's Third Front. Edited and translated by Ina Friedman. New York: Simon and Schuster, 1990. Pp.352. $22.95. ISBN 0–67530–3     

The Reform of the Local Administration in Spain in Terms of Population

Spanish Local Corporations are playing an increasingly important role in the provision of public services without reducing their function of consolidation and structuring of the current sociopolitical system. This reality implies an increase in their need of financial funds without new compensation resources. Also, there is a certain tendency to loose population in many counties along with a greater organic and territorial dispersion that accelerates their financial weakening. This makes necessary to find management alternatives ensuring the appropriate provision of local public services and thus the Local Corporation reform becomes an alternative. In this context, the present paper approaches the analysis and the results based upon a territorial balance criterion on the population and its distribution, aiming ultimately to design an indicator able to measure the need of the Spanish local government structure according to its population and the size of its municipalities. This indicator might measure the regional impact to any variation both in the distribution of its population and in the number of municipalities.     

Regulation as a cause of firm fragmentation:the case of the Spanish construction industry

Team members organize their relationships to achieve efficient incentives in accordance with institutional constraints. When these constraints change, the rights and tasks of members are reallocated, generating a new contractual structure [or governance mechanism] that solves more easily the problem of collective action associated with team production. We show how this process has worked in the case of Spanish construction firms, in which more restrictive labor and tax regulations have induced parties to substitute market contracts for labor contracts because of the need to avoid moral hazards. We argue that this explains the increased fragmentation of the Spanish construction industry, and technical change does not seem to account for this process.     

Real-time PCR designs to estimate nuclear and mitochondrial DNA copy number in forensic and ancient DNA studies

We explore different designs to estimate both nuclear and mitochondrial human DNA (mtDNA) content based on the detection of the 5' nuclease activity of the Taq DNA polymerase using fluorogenic probes and a real-time quantitative PCR detection system. Human mtDNA quantification was accomplished by monitoring the real-time progress of the PCR-amplification of two different fragment sizes (113 and 287 bp) within the hypervariable region I (HV1) of the mtDNA control region, using two fluorogenic probes to specifically determine the mtDNA copy of each fragment size category. This mtDNA real-time PCR design has been used to assess the mtDNA preservation (copy number and degradation state) of DNA samples retrieved from 500 to 1500 years old human remains that showed low copy number and highly degraded mtDNA. The quantification of nuclear DNA was achieved by real-time PCR of a segment of the X-Y homologous amelogenin (AMG) gene that allowed the simultaneous estimation of a Y-specific fragment (AMGY: 112 bp) and a X-specific fragment (AMGX: 106 bp) making possible not only haploid or diploid DNA quantitation but also sex determination. The AMG real-time PCR design has been used to quantify a set of 57 DNA samples from 4-5 years old forensic bone remains with improved sensitivity compared with the slot-blot hybridization method. The potential utility of this technology to improve the quality of some PCR-based forensic and ancient DNA studies (microsatellite typing and mtDNA sequencing) is discussed.     

Validation of the Attitudes About Aggression in Dating Situations (AADS) and the Justification of Verbal/Coercive Tactics Scale (JVCT) in Spanish Adolescents

The aim of this study was to analyze the psychometric properties of two instruments that assess attitudes justifying use of aggression in adolescents?? dating relationships: the Attitudes About Aggression in Dating Situations (AADS) and the Justification of Verbal/Coercive Tactics Scale (JVCT). The sample was made up of 2,856 adolescents from different high schools of Madrid. Results supported the three-factor structure for the AADS and the six-factor structure for the JVCT, which was consistent with the theory and with previous research. As expected, the relation between attitudes and aggressive behavior was between small and moderate but significant in most cases. Furthermore, attitudes differed depending on the type of violence, the respondent??s sex, and on whether aggression is carried out by a man or a woman. Finally, the potential applications of these two scales are discussed, and it is concluded that both constitute useful tools to assess justification of aggression in dating relationships in young couples.     

Occurrence of contamination by controlled substances in Euro banknotes from the Spanish archipelago of the Canary Islands

The social problems of drug abuse are a matter of increasing global problem. Nowadays, international agencies need fresh methods to monitor trends of the use of illicit drugs. In this sense, small amounts of drugs are transferred to banknotes and they could be detected and quantified. An analytical procedure based upon extraction with organic solvent, liquid chromatography separation, and mass spectrometric detection allowed the identification of 21 drugs and metabolites in 120 used Euro banknotes collected in the Canary Islands (Spain). Most of the banknotes analyzed showed detectable drug residues (92.5%). Cocaine was the most frequently detected drug, present in approximately 90% of the samples. In addition, 75%, 35%, and 15% of the banknotes showed residues of amphetamine derivatives, opiates, and benzodiazepines, respectively. An average of three drug residues per banknote was detected. In summary, the presence of drug residues in banknotes could be useful as tracer for drugs prevalence.     

Business,social responsibility,and corruption

This paper explores the role of corporate social responsibility and the reporting thereof in the fight against corruption. A special focus is laid on the international endeavors to improve transparency through reporting, and the paper elaborates extensively on the United Nations Global Compact (UNGC), the Organisation for Economic Co‐operation and Development (OECD) Guidelines for Multinational Enterprises and the Global Reporting Initiative's (GRI) Sustainability Reporting Guidelines. Voluntary initiatives, such as the UNGC, the OECD guidelines, and the GRI guidelines, are considered to play an important role in providing the trust‐based informal social norms, without which markets and societies cannot function. Copyright © 2012 John Wiley & Sons, Ltd.