Demand for labour inputs and adjustment costs : evidence from Spanish manufacturing firms

This paper examines the structure of the adjustment costs for heterogeneous labour inputs, allowing for asyrnmetries and for interaction effects in adjustment costs. To do this, an intertemporal model underlying firm's employment decisions is postulated, and the resulting Euler equations for the demands of permanent nonproduction (white collar) and production (blue collar) employees are estimated using a sample of Spanish manufacturing firms. The main results confirm the heterogeneity of adjustment costs for permanent employees, and the existence of significant cross-adjustment effects. This latter result implies that marginal adjustment costs from firing permanent production employees can be reduced if temporary workers are hired at the same time. However, there is not significant evidence of asyrnmetric adjustment costs in permanent labour inputs

Juan Latino "El Negro": Poet and Humanist

The article explores the historical novel written by José V. Pascual about the life and Works of Juan Latino "El Negro" focusing on the humanism of this black poet and professor and his contributions to the Afro-spanish historical memory.Universidad de Malaga Campus de EXcelencia Internacional Andalucia Tech

International Conference. 20th Century New Towns. Archetypes and Uncertainties

Producción CientíficaThe paper aims to revalue and to compare two urban phenomena of growth and change during the second half of the 20th century: the Mat Building and the Gated City. On the one hand, Mat Building is analysed as a modern strategy of spatial and formal organization in architecture, which is related to the concept of Mat Urbanism. This idea is rooted in the interest of TEAM X in the traditional cities of North Africa, Japan and China, among others, during the late 1950s and 1960s. In 1974 Alison Smithson defined this urban structure using the model of Arab fortresses called Kasbah: “where the functions come to enrich the fabric, and the individual gains new freedoms of action through a new shuffled order, based on interconnection, close knit patterns of association and possibilities for growth, diminution and change.” Alison Smithson formulated an alternative to the functional city described in the CIAM´s Athens Charter. But she also proposed a new urban form, closed and opened at the same time, a kind of urban structure based on the necessity of identity and mobility. On the other hand, the phenomenon of the Gated City is also closely related to the idea of urban identity. The CIDs (Common-Interest-Developments) began to emerge at the end of the 1970s, but actually, that idea was put into practice during the 19th century, as a reaction of utopian socialism to environmental and social consequences of the Industrial Revolution. In the context of the sprawling city, during second half of the 20th century, the New Urbanism also established its criticism to the urban ideology of the Modern Movement, as the TEAM X had done before them. However, unlike the previous one, this current used the paradigm of the walled medieval city, or Gated City, which was indebted to the anti-industrial manifesto of Rob and Leon Krier. They wrote: “function follows form”, and not the opposite, as Louis Sullivan had said. Therefore, a purely picturesque approach to urban form was adopted, against the rationalism of the modern post-war planning. The paper compares both strategies through European and North American urban developments. It analyses their spatial and social structures pointing their own relevance in contemporary urban discourse, and it provides a critical relationship between them, which is full of paradoxes and contradictions for the sustainable urbanism and the landuse planning challenges

The Black Sexual Body as Palimpsest

Análisis de las politicas sexuales a las que se sometía el cuerpo de la mujer negra en las colonias Norteamericanas del siglo 19Universidad de Málaga. Campus de Excelencia Andalucía Tech

Symmetrically normalized instrumental-variable estimation using panel data

In this paper we discuss the estimation of panel data models with sequential moment restrictions using symmetrically normalized GMM estimators. These estimators are asymptotically equivalent to standard GMM but are invariant to normalization and tend to have a smaller finite sample bias. They also have a very different behaviour compared to standard GMM when the instruments are poor. We study the properties of SN-GMM estimators in relation to GMM, minimum distance and pseudo maximum likelihood estimators for various versions of the AR(1) model with individual effects by mean of simulations. The emphasis is not in assessing the value of enforcing particular restrictions in the model; rather, we wish to evaluate the effects in small samples of using alternative estimating criteria that produce asymptotically equivalent estimators for fixed T and large N. Finally, as an empírical illustration, we estimate by SN-GMM employment and wage equations using panels of UK and Spanish firms

Labor contracts and flexibility : evidence from a labor markt reform in Spain

This paper evaluates the effects on employment, job turnover and productivity of a labor market reform in Spain that eliminated dismissal costs for fixed-term contracts. Our empirical results are based on a panel of 2356 Spanish manufacturing firms for the period 1982-1993. We postulate and estimate a dynamic labor demand model with indefinite and fixed-term labor contracts. Our estimations use data on severance payments to identify when negative changes in employment have been associated with costly dismissals. Experiments using the estimated model show important positive effects of the reform on employment (between 2.5% and 4.5%) and job turnover (between five and seven percentage points). However, its effects on productivity and the value of a firm are negligible. This contrasts with the sizeable increases in output and v3.Iue under a hypothetical reduction in firing costs for all type of contracts. Compared with this alternative reform, the introduction of temporary contracts leads to excess turnover and employment of workers with low firm-specific experience

Investment and Q in Spanish manufacturing firms

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Corporate diversification and R&D intensity dynamics

We study the dynamic bidirectional relationship between firm R&D intensity and corporate diversification, using longitudinal data of Spanish manufacturing companies. Our empirical approach takes into account the censored nature of the dependent variables and the existence of firm-specific unobserved heterogeneity. Whereas we find a positive linear effect of R&D intensity on related diversification, the evidence about the effect of related diversification on R&D intensity takes the form of an inverted U. Hence, the effect of related diversification on R&D intensity is positive but marginally decreasing for moderate levels of related diversification, but such effect can turn out negative for high levels of related diversification. Additionally, the consequences of the dynamic relation are that the effects are substantially larger in the long-run than in the short-run

Discovering New Sentiments from the Social Web

A persistent challenge in Complex Systems (CS) research is the phenomenological reconstruction of systems from raw data. In order to face the problem, the use of sound features to reason on the system from data processing is a key step. In the specific case of complex societal systems, sentiment analysis allows to mirror (part of) the affective dimension. However it is not reasonable to think that individual sentiment categorization can encompass the new affective phenomena in digital social networks. The present papers addresses the problem of isolating sentiment concepts which emerge in social networks. In an analogy to Artificial Intelligent Singularity, we propose the study and analysis of these new complex sentiment structures and how they are similar to or diverge from classic conceptual structures associated to sentiment lexicons. The conjecture is that it is highly probable that hypercomplex sentiment structures -not explained with human categorizations- emerge from high dynamic social information networks. Roughly speaking, new sentiment can emerge from the new global nervous systems as it occurs in humans