Are two-part tariffs efficient when consumers plan ahead?: An empirical study

During the last two decades there has been an increase in using dynamic tariffs for billing household electricity consumption. This has questioned the suitability of traditional pricing schemes, such as two-part tariffs, since they contribute to create marked peak and offpeak demands. The aim of this paper is to assess if two-part tariffs are an efficient pricing scheme using Spanish household electricity microdata. An ordered probit model with instrumental variables on the determinants of power level choice and non-paramentric spline regressions on the electricity price distribution will allow us to distinguish between the tariff structure choice and the simultaneous demand decisions. We conclude that electricity consumption and dwellings’ and individuals’ characteristics are key determinants of the fixed charge paid by Spanish households Finally, the results point to the inefficiency of the two-part tariff as those consumers who consume more electricity pay a lower price than the others.

Agronomic and commercial performance of four Spanish carob cultivars

The carob tree (Ceratonia siliqua) shows interesting prospects for some coastal Mediterranean growing areas and is widely used for industrial, agricultural, and ornamental purposes. It can be an alternative crop adapted to part-time farming and can also be used to regenerate vegetation in areas with a mild climate and erosion problems. Four Spanish carob cultivars were examined (Banya de Cabra, Duraio, Matalafera, and Rojal) to determine the one that performed the best for planting new orchards in northeastern Spain (Catalonia). The trees in this rain-fed trial (average rainfall of 500 mm) were planted in 1986 using seedling rootstocks that were budded in 1987. The trees were trained using the free-vase system and were spaced 8 x 9 m (138 trees/ha including 12% pollinators). The results showed that ‘Rojal’ was the earliest bearing cultivar. However, no significant differences were observed for cumulative pod production 18 years after budding. With respect to cumulative seed yield, ‘Duraio’ had the highest production (95 kg/tree). The lowest tree vigor (trunk cross-section) was observed in ‘Matalafera’. ‘Rojal’ trees produced the largest pods (average fruit weight of 18.9 g) and lowest seed content (11.8%), while ‘Banya de Cabra’ and ‘Duraio’ produced the smallest fruit (weighing 15.3 and 16.2 g, respectively) with the highest seed content (15.2% and 17.3%, respectively). Gum content, expressed as a percentage of the dry weight, was highest in ‘Duraio’ (56.9%) and was lowest in ‘Rojal’ (54.1%). Thus, in terms of kernel and pod production, ‘Duraio’ appeared to be the best-performing female cultivar for planting new carob orchards

The Part-time pay penalty in a segmented labor market

This paper is the first to examine the implications of switching to PT work for women's subsequent earnings trajectories, distinguishing by their type of contract: permanent or fixedterm. Using a rich longitudinal Spanish data set from Social Security records of over 76,000 prime-aged women strongly attached to the Spanish labor market, we find that PT work aggravates the segmentation of the labor market insofar there is a PT pay penalty and this penalty is larger and more persistent in the case of women with fixed-term contracts. The paper discusses problems arising in empirical estimation (including a problem not discussed in the literature up to now: the differential measurement error of the LHS variable by PT status), and how to address them. It concludes with policy implications relevant for Continental Europe and its dual structure of employment protection.

Determinants sociodemogràfics, incentius i rendiments econòmics de l'aprenentage de l'idioma Català per part de la població immigrant a Catalunya

En aquest projecte s’han estudiat diferents aspectes relacionats amb l’aprenentatge del català per part de la població immigrant. Aquest es un tema rellevant donat que les habilitats idiomàtiques dels immigrants es una altra forma de capital humà, que no només facilita la seva integració social, sinó que també incrementa les seves oportunitats laborals. En aquest estudi s’ha enfocat l’aprenentatge de l’idioma català per part de la població immigrant com una inversió de la qual es deriven costos i beneficis. Una qüestió rellevant és quins son els incentius que els immigrants que ja parlen el castellà, bé per que és la seva llengua materna o per que l’han après amb posterioritat, tenen per aprendre la llengua catalana. Aquest estudi es encara més interessant si considerem aquells immigrants que no tenen un nivell fluït del castellà, i encara més els que arriben a Catalunya sense conèixer cap de les dues llegües oficials. Aquest estudi es centra en els determinants econòmics i demogràfics del nivell de coneixement del català entre els immigrants a Catalunya. En aquest sentit, és clau determinar el rol que juguen variables com el grau d’exposició, eficiència i els incentius econòmics, com per exemple les conseqüències laborals (salaris i oportunitat de treball). Tanmateix, també es important determinar si viure en entorns on hi ha una gran concentració d’immigrants d’un mateix país exerceix un efecte depressor en l’aprenentatge del català per part dels immigrants. La segona part del projecte ha consistit en estimar un model per contrastar la hipòtesi de si el coneixement del català per part dels immigrants implica un millor salari. Per altra banda, també analitzarem si aquest coneixement del català implícita tenir accés a millors oportunitats de treball. La confirmació d’aquestes hipòtesis implicaria que els immigrants realment tenen un incentiu econòmic per invertir en l’aprenentatge del català.     

Multiuser detection in a dynamic environment — Part II: Joint user identification and parameter estimation

The problem of jointly estimating the number, the identities, and the data of active users in a time-varying multiuser environment was examined in a companion paper (IEEE Trans. Information Theory, vol. 53, no. 9, September 2007), at whose core was the use of the theory of finite random sets on countable spaces. Here we extend that theory to encompass the more general problem of estimating unknown continuous parameters of the active-user signals. This problem is solved here by applying the theory of random finite sets constructed on hybrid spaces. We doso deriving Bayesian recursions that describe the evolution withtime of a posteriori densities of the unknown parameters and data.Unlike in the above cited paper, wherein one could evaluate theexact multiuser set posterior density, here the continuous-parameter Bayesian recursions do not admit closed-form expressions. To circumvent this difficulty, we develop numerical approximationsfor the receivers that are based on Sequential Monte Carlo (SMC)methods (“particle filtering”). Simulation results, referring to acode-divisin multiple-access (CDMA) system, are presented toillustrate the theory.

The struggle against creative accounting: Is "true and fair view" part of the problem or part of the solution?

Creative accounting is a growing issue of interest in Spain. In this article we argue that the concept true and fair view can limit or promote the use of creative accounting depending upon its interpretation. We review the range of meanings that true and fair view can take at an international level and compare the experience of the United Kingdom with the Australian one by analysing the use of true and fair view to limit creative accounting. Finally, we suggest lines of action to be considered by the Spanish accounting standards-setting institutions.

Children's work in Spanish textiles during the 19th and 20th Centuries

This essay deals with the reasons explaining children s work in 19th century textile factories and their removal during the first part of the 20th century. The inadequacy of the structure of incomes and expenditures of the household and the very low economic incentives to educate children can explain why children were in the factories and not in the school. Moreover, the marginal economic contribution to the economy of the household of a child was the same as that of his mother. This normally implied that women and children were perfect substitutes. When the family had a child at working age this allowed to replace the paid work input of the mother. With the beginnings of the 20th century a set of changes leading to the increase of women s productivity and hourly real wages, switched the situation and involved the new incorporation of women into paid work and the investment in children s human capital.

Job creation under liquidity constraints: The Spanish case

This paper shows that liquidity constraints restrict jobcreation even when labor markets are flexible. In a dynamicmodel of labor demand, I show that in an environment of imperfect capital and imperfect labor markets, firms usetemporary contracts to relax financial constraints. Evidence for the predictions of the model is presented using Spanish data from the CBBE (Central de Balances del Banco de España - Balance Sheet data from the Bank of Spain). It is shown that firms substitute temporary laborfor permanent one and use less debt as their financial position improves. In particular, it is rejected that Spanish firms operate in an environment of free capital markets and of no labor adjustment costs. The labor reform of 1984, which created temporary contracts, implied to some extent a relaxation of liquidity constraints.Accordingly, firms used these contracts more extensivelyand used less debt; however, as capital markets continueto be imperfect, permanent job creation continues to beslow. Consequently, relaxation of liquidity constraints should also be part of a job creation strategy.

Normativización del Inventario del Desarrollo Comunicativo MacArthur-Bates al español, Colombia = Normativization to the Spanish-Colombia to the CDI- MacArthur-Bates Communicative Development Inventories

El Inventario del Desarrollo Comunicativo MacArthur- Bates (CDI Fenson, Marchman, Thal, Dale & Reznick, 2007) es un instrumento que permite evaluar de forma válida y confiable el desarrollo comunicativo y lingüístico de niños pequeños. Este estudio da cuenta del proceso de adaptación del CDI a los usos lingüísticos y al contexto cultural colombiano, así como su primera fase de baremación en la ciudad de Bogotá y sus alrededores. Los padres de 825 niños y niñas entre 8 y 30 meses de edad de diferentes estratos socioeconómicos, residentes en la ciudad de Bogotá y poblaciones aledañas, diligenciaron los inventarios adaptados para la población. El análisis estadístico incluyó medidas de confiabilidad y validez, las cuales avalan la consistencia interna y el valor predictivo de las escalas. Los resultados del presente estudio permiten identificar el ritmo evolutivo del proceso de adquisición del lenguaje en los niños colombianos, observando reorganizaciones y discontinuidades tal y como se reporta en otras adaptaciones del CDI

How are Spanish academics coping with changes? Responses from a life histories research.

[eng] This report is part of the research project, The effects of social changes in work and professional life of Spanish academics, partially financed by the Spanish Ministry of Science and Innovation (SEJ2006-01876), that has explored change in legislation, organisation, research schemes and so on, in the last thirty years. The main aim of this project is deepening our understanding of the impact of undergoing economic, social, cultural, technological and labour change in Spanish universities in the life and professional identity of the teaching and research staff, taking into account the national and european context. This paper gathers part of the results gained from the project, being its primary objective to contribute to an improved knowledge-base on professional knowledge and work experience in higher education institutions in Spain and, as a consequence, to understand how Spanish academics are coping with current changes.

Models d'interpretació de la cançó tradicional catalana per part dels mestres especialistes de música a l'escola primària

Aquest treball de recerca, realizat amb mestres especialistes de música de l'etapa primària, exposa diversos models d'interpretació de la cançó, prèvia exposició dels diversos elements que en configuren el caràcter.

How are Spanish academics coping with changes? Responses from a life histories research.

[eng] This report is part of the research project, The effects of social changes in work and professional life of Spanish academics, partially financed by the Spanish Ministry of Science and Innovation (SEJ2006-01876), that has explored change in legislation, organisation, research schemes and so on, in the last thirty years. The main aim of this project is deepening our understanding of the impact of undergoing economic, social, cultural, technological and labour change in Spanish universities in the life and professional identity of the teaching and research staff, taking into account the national and european context. This paper gathers part of the results gained from the project, being its primary objective to contribute to an improved knowledge-base on professional knowledge and work experience in higher education institutions in Spain and, as a consequence, to understand how Spanish academics are coping with current changes.

How are Spanish academics coping with changes? Responses from a life histories research.

[eng] This report is part of the research project, The effects of social changes in work and professional life of Spanish academics, partially financed by the Spanish Ministry of Science and Innovation (SEJ2006-01876), that has explored change in legislation, organisation, research schemes and so on, in the last thirty years. The main aim of this project is deepening our understanding of the impact of undergoing economic, social, cultural, technological and labour change in Spanish universities in the life and professional identity of the teaching and research staff, taking into account the national and european context. This paper gathers part of the results gained from the project, being its primary objective to contribute to an improved knowledge-base on professional knowledge and work experience in higher education institutions in Spain and, as a consequence, to understand how Spanish academics are coping with current changes.

EsPal: One-stop shopping for Spanish word properties

This article introduces EsPal: a Web-accessible repository containing a comprehensive set of properties of Spanish words. EsPal is based on an extensible set of data sources, beginning with a 300 million token written database and a 460 million token subtitle database. Properties available include word frequency, orthographic structure and neighborhoods, phonological structure and neighborhoods, and subjective ratings such as imageability. Subword structure properties are also available in terms of bigrams and trigrams, bi-phones, and bi-syllables. Lemma and part-of-speech information and their corresponding frequencies are also indexed. The website enables users to either upload a set of words to receive their properties, or to receive a set of words matching constraints on the properties. The properties themselves are easily extensible and will be added over time as they become available. It is freely available from the following website: http://www.bcbl.eu/databases/espal

Competing linguae france: the place of english and spanish for chinese students

This research project focuses on the role of English and Spanish as linguae francae. More specifically, the research attempts to answer the following questions: (i) What is the place of English and Spanish as linguae francae in the world, in general, and in China, in particular? (ii) What kinds of foreign language teaching/learning attitudes and practices are characteristic of the Chinese educational system? (iii) What are the motivations, expectations and experience of Chinese students in study abroad programmes, in general, and in the programme of the University of Lleida, in particular? The study constitutes an attempt to answer each of these questions in two ways: a review of the literature and a pilot study with 26 Chinese students at UdL. The research reveals that even though English is a very dominant foreign language in China, Spanish is a language on the rise and mainly for economic reasons. The results of the study also point at the impact of the dominance of the grammar-translation method in the perspective of Chinese students about language learning. Finally, the study shows the relevance of taking part in a SA programme for Chinese students as well as their experience of them.