Unit Roots and Cointegrating Matrix Estimation using Subspace Methods

We propose a new procedure to detect unit roots based on subspace methods. It has three main original features. First, the same method can be applied to single or multiple time series. Second, it employs a flexible family of information criteria, which loss functions can be adapted to the statistical properties of the data. Last, it does not require the specification of a stochastic process for the series analyzed. Also, we provide a consistent estimator of the cointegrating rank and the cointegrating matrix. Simulation exercises show that the procedure has good finite sample properties. An example illustrates its application to real time series.State-space models, subspace methods, unit roots, cointegration.

A Model for the Temporary Help Services Industry in the Presence of Unemployment: Theoretical and Em

The temporary help services (THS) industry has experienced an impressive growth, representing 16% of temporary hiring in Spain. At the same time it exhibits a remarkable regional disparity. The main purpose of this paper is to develop an appropriate theoretical model for analysing the THS phenomenon in the presence of unemployment. In addition, this study examines the Spanish case, using proxy variables and panel data methodology. The paper concludes that the fixed cost of hiring is an essential factor to explain the growth of this business and regional discrepancies. In particular, it is stated that the sectorial composition for provinces (proxy variable for the hiring costs) constitutes a major factor in determining the proportion of temporary contracts formalised through THS firms.

BREVES NOTAS SOBRE A TUTELA MANDAMENTAL E O ART. 14, INC. V, E PARÁGRAFO ÚNICO DO CPC

Para chegar ao conceito de tutela mandamental, o texto transita por temas considerados relevantes hoje, tendo em vista a alteração do art. 14, inc. V do CPC, pela Lei n. 10.358/2001, que faz referência às decisões mandamentais, cuja violação geram graves sanções, nos termos da disposição legal. Em linhas gerais salienta não haver diferença, em termos de efetividade, entre o direito oriundo da relação obrigacional e aquele que decorre de fundamento não obrigacional, concluindo no sentido de que a decisão mandamental contém uma ordem de seu descumprimento pode acarretar o surgimento do crime respectivo

Curso de processo civil

Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à Lei de Direitos Autorais, não disponibilizamos a obra na íntegra.Localização na estante: 347.91/.95(81) M491d

Curso de direito processual civil moderno

- Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à Lei de Direitos Autorais, não disponibilizamos a obra na íntegra.- Localização na estante: 347.91/.95(81) M491d 7.ed

BREVES NOTAS SOBRE A TUTELA MANDAMENTAL E O ART. 14, INC. V, E PARÁGRAFO ÚNICO DO CPC

Para chegar ao conceito de tutela mandamental, o texto transita por temas considerados relevantes hoje, tendo em vista a alteração do art. 14, inc. V do CPC, pela Lei n. 10.358/2001, que faz referência às decisões mandamentais, cuja violação geram graves sanções, nos termos da disposição legal. Em linhas gerais salienta não haver diferença, em termos de efetividade, entre o direito oriundo da relação obrigacional e aquele que decorre de fundamento não obrigacional, concluindo no sentido de que a decisão mandamental contém uma ordem de seu descumprimento pode acarretar o surgimento do crime respectivo

AATR an ionospheric activity indicator specifically based on GNSS measurements

This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance of Global Navigation Satellite System (GNSS). This index is based in the Along Arc TEC Rate (AATR) and can be easily computed from dual-frequency GNSS measurements. The AATR indicator has been assessed over more than one Solar Cycle (2002–2017) involving about 140 receivers distributed world-wide. Results show that it is well correlated with the ionospheric activity and, unlike other global indicators linked to the geomagnetic activity (i.e. DST or Ap), it is sensitive to the regional behaviour of the ionosphere and identifies specific effects on GNSS users. Moreover, from a devoted analysis of different Satellite Based Augmentation System (SBAS) performances in different ionospheric conditions, it follows that the AATR indicator is a very suitable mean to reveal whether SBAS service availability anomalies are linked to the ionosphere. On this account, the AATR indicator has been selected as the metric to characterise the ionosphere operational conditions in the frame of the European Space Agency activities on the European Geostationary Navigation Overlay System (EGNOS). The AATR index has been adopted as a standard tool by the International Civil Aviation Organization (ICAO) for joint ionospheric studies in SBAS. In this work we explain how the AATR is computed, paying special attention to the cycle-slip detection, which is one of the key issues in the AATR computation, not fully addressed in other indicators such as the Rate Of change of the TEC Index (ROTI). After this explanation we present some of the main conclusions about the ionospheric activity that can extracted from the AATR values during the above mentioned long-term study. These conclusions are: (a) the different spatial correlation related with the MOdified DIP (MODIP) which allows to clearly separate high, mid and low latitude regions, (b) the large spatial correlation in mid latitude regions which allows to define a planetary index, similar to the geomagnetic ones, (c) the seasonal dependency which is related with the longitude and (d) the variation of the AATR value at different time scales (hourly, daily, seasonal, among others) which confirms most of the well-known time dependences of the ionospheric events, and finally, (e) the relationship with the space weather events.Postprint (published version

Fast-PPP assessment in European and equatorial region near the solar cycle maximum

Oustanding Student Poster Award, European Geosciences Union General Assembly, 2014Award-winningPostprint (published version