Public jobs creation and unemployment dynamics

This paper raises the question of the dynamic effects of public spending in jobs on labor market performance. We use a dynamic matching model and study how public jobs creation affects endogenous workers' decisions to move on the labor market and private-sector firms' job creation and destruction decisions. We obtain that it exerts an attracting effect and a fiscal effect on the labor market that make the unemployment rate and job flows overshoot. As an empirical illustration, we estimate a SVAR model that focuses on the consequences of public job creations on unemployment, wages and job flows dynamics. We confirm our intuition : public employment has a significant ambiguous effect on private wages.Public sector labor market, unemployment dynamics.

Public jobs creation and unemployment dynamics

URL des Cahiers : https://halshs.archives-ouvertes.fr/CAHIERS-MSECahiers de la Maison des Sciences Economiques 2006.26 - ISSN 1624-0340This paper raises the question of the dynamic effects of public spending in jobs on labor market performance. We use a dynamic matching model and study how public jobs creation affects endogenous workers' decisions to move on the labor market and private-sector firms' job creation and destruction decisions. We obtain that it exerts an attracting effect and a fiscal effect on the labor market that make the unemployment rate and job flows overshoot. As an empirical illustration, we estimate a SVAR model that focuses on the consequences of public job creations on unemployment, wages and job flows dynamics. We confirm our intuition: public employment has a significant ambiguous effect on private wages.Ce papier analyse la dynamique transitoire du marché du travail en présence d'emplois publics. Un modèle d'appariement dynamique nous permet d'étudier commment les effets de la création d'emplois publics se propagent dans le temps en présence de deux sources d'éviction : une concurrence entre les secteurs publlic et privé pour attirer les travailleurs et une pression fiscale qui accroît le coût du travail des entreprises privées. L'effet d'attraction et les externalités fiscales exercées affectent la dynamique du chômage et celle des flux de création et de destruction d'emplois privés. Un modèle vectoriel auto-régressif, appliqué aux données américaines (1972 : 2 - 1993 : 4), illustre empiriquement notre mécanisme théorique. Nos prédictions théoriques sont confirmées : le chômage diminue significativement à court terme suite à la création d'emplois publics et l'emploi public a un effet ambigu significatif sur les salaires privés

Is Sustainability Attractive for Corporate Real Estate Decisions ?

This paper provides an analysis of the impact of sustainable principles on corporate property decisions and attractiveness for business districts in the French context. It is based on a behavioural survey conducted across a large sample of corporate property managers and a MCA approach which highlights key factors about the influence of sustainable principles among traditional determinants of territorial attractiveness. This approach allows us to draw up a typology of actors regarding the diffusion of sustainability issues. It emphasizes a general improvement of sustainability on location choice especially for listed companies, owners of their head office and companies located into the main business districts of the Paris metropolitan area.Sustainable City ; Corporate Real Estate Management ; Territorial Attractiveness ; Office Business Districts

A Spatial and Temporal Autoregressive Local Estimation for the Paris Housing Market

This original study examines the potential of a spatiotemporal autoregressive Local (LSTAR) approach in modelling transaction prices for the housing market in inner Paris. We use a data set from the Paris Region notary office (“Chambre des notaires d’Île-de-France”) which consists of approximately 250,000 transactions units between the first quarter of 1990 and the end of 2005. We use the exact X -- Y coordinates and transaction date to spatially and temporally sort each transaction. We first choose to use the spatiotemporal autoregressive (STAR) approach proposed by Pace, Barry, Clapp and Rodriguez (1998). This method incorporates a spatiotemporal filtering process into the conventional hedonic function and attempts to correct for spatial and temporal correlative effects. We find significant estimates of spatial dependence effects. Moreover, using an original methodology, we find evidence of a strong presence of both spatial and temporal heterogeneity in the model. It suggests that spatial and temporal drifts in households socio-economic profiles and local housing market structure effects are certainly major determinants of the price level for the Paris Housing Market.Hedonic Prices; Heterogeneity; Paris Housing Market; STAR Model

A Spatiotemporal Autoregressive Price Index for the Paris Office Property Market

This paper applies the spatiotemporal hedonic approach to analysis of office transaction prices in the Paris property market (i.e. central Paris and its inner suburbs). The analysis focuses primarily on the market’s two main business districts (the CBD and the La Defense District). We find that spatial and temporal dependence effects are strongly present in these submarkets. Additionally, we propose a hybrid method for incorporating a temporal regime into the spatiotemporal autoregressive model proposed by Pace, Barry, Clapp and Rodriguez (1998). Regime switching around 1997 (i.e. in the presence of temporal heterogeneity) substantially affects the significance of spatial and temporal dependences. Finally, we build a new price index that incorporates both spatiotemporal dependences and temporal heterogeneity. This index differs strongly from the usual hedonic price indexHedonic Prices; Paris Office Property Market; Spatiotemporal Autoregressive Price Index; Temporal Heterogeneity

Relationships between magmatism and extension along the Autun-La Serre fault system in the Variscan Belt of the eastern French Massif Central

International audienceThe ENE-WSW Autun Shear Zone in the northeastern part of the French Massif Central has been interpreted previously as a dextral wrench fault. New field observations and microstructural analyses document a NE-SW stretching lineation that indicates normal dextral motions along this shear zone. Further east, similar structures are observed along the La Serre Shear Zone. In both areas, a strain gradient from leucogranites with a weak preferred orientation to highly sheared mylonites supports a continuous Autun-La Serre fault system. Microstructural observations, and shape and lattice-preferred orientation document high-temperature deformation and magmatic fabrics in the Autun and La Serre granites, whereas low- to intermediate-temperature fabrics characterize the mylonitic granite. Electron microprobe monazite geochronology of the Autun and La Serre granites yields a ca. 320 Ma age for pluton emplacement, while mica 40Ar-39Ar datings of the Autun granite yield plateau ages from 305 to 300 Ma. The ca. 300 Ma 40Ar-39Ar ages, obtained on micas from Autun and La Serre mylonites, indicate the time of the mylonitization. The ca. 15-Ma time gap between pluton emplacement and deformation along the Autun-La Serre fault system argue against a synkinematic pluton emplacement during late orogenic to postorogenic extension of the Variscan Belt. A ductile to brittle continuum of deformation is observed along the shear zone, with Lower Permian brittle faults controlling the development of sedimentary basins. These results suggest a two-stage Late Carboniferous extension in the northeastern French Massif Central, with regional crustal melting and emplacement of the Autun and La Serre leucogranites around 320 Ma, followed, at 305-295 Ma, by ductile shearing, normal brittle faulting, and subsequent exhumation along the Autun-La Serre transtensional fault system

Is Sustainability Attractive for Corporate Real Estate Decisions ?

ESSEC Working paper. Document de Recherche ESSEC / Centre de recherche de l'ESSEC ISSN : 1291-9616 WP1106This paper provides an analysis of the impact of sustainable principles on corporate property decisions and attractiveness for business districts in the French context. It is based on a behavioural survey conducted across a large sample of corporate property managers and a MCA approach which highlights key factors about the influence of sustainable principles among traditional determinants of territorial attractiveness. This approach allows us to draw up a typology of actors regarding the diffusion of sustainability issues. It emphasizes a general improvement of sustainability on location choice especially for listed companies, owners of their head office and companies located into the main business districts of the Paris metropolitan area

Zinc-rich clays in supergene non-sulfide zinc deposits

International audienceThe nature and the origin of zinc clays are poorly understood. With the example of the Bou Arhous Zn-Pb ore deposit in the Moroccan High Atlas, this study presents new data for the mineralogical and chemical characterization of barren and zinc clays associated with non-sulfide zinc ores. In the field, white to ocher granular clays are associated with willemite (Zn2SiO4), while red clays fill karst-related cavities cutting across the non-sulfide ore bodies. Red clays (kaolinite, chlorite, illite, and smectite) present evidence of stratification that reflects internal sedimentation processes during the karst evolution. White clays contain 7-Å clay mineral/smectite irregular interstratified minerals with less than 20 % of smectite layers. Willemite is partially dissolved and is surrounded by authigenic zinc clay minerals. Together with XRD results, WDS analyses on newly formed clay aggregates suggest that this interstratified mineral is composed of fraipontite and sauconite. CEC measurements support that zinc is only located within the octahedral sheets. These new results support the following process: (i) dissolution of willemite, leading to release of Si and Zn, (ii) interaction between Zn-Si-rich solutions and residual-detrital clays, and (iii) dissolution of kaolinite and formation of interstratified zinc clay minerals that grew over detrital micas

Small-scale gene duplications played a major role in the recent evolution of wheat chromosome 3B

Background: Bread wheat is not only an important crop, but its large (17 Gb), highly repetitive, and hexaploid genome makes it a good model to study the organization and evolution of complex genomes. Recently, we produced a high quality reference sequence of wheat chromosome 3B (774 Mb), which provides an excellent opportunity to study the evolutionary dynamics of a large and polyploid genome, specifically the impact of single gene duplications.Results: We find that 27 % of the 3B predicted genes are non-syntenic with the orthologous chromosomes of Brachypodium distachyon, Oryza sativa, and Sorghum bicolor, whereas, by applying the same criteria, non-syntenic genes represent on average only 10 % of the predicted genes in these three model grasses. These non-syntenic genes on 3B have high sequence similarity to at least one other gene in the wheat genome, indicating that hexaploid wheat has undergone massive small-scale interchromosomal gene duplications compared to other grasses. Insertions of non-syntenic genes occurred at a similar rate along the chromosome, but these genes tend to be retained at a higher frequency in the distal, recombinogenic regions. The ratio of non-synonymous to synonymous substitution rates showed a more relaxed selection pressure for non-syntenic genes compared to syntenic genes, and gene ontology analysis indicated that non-syntenic genes may be enriched in functions involved in disease resistance.Conclusion: Our results highlight the major impact of single gene duplications on the wheat gene complement and confirm the accelerated evolution of the Triticeae lineage among grasses

Internal structures and dating of non-sulphide Zn deposits 5 using rock magnetism: insights from the Moroccan High Atlas

International audienceThe renewal of interest in Zn-Pb non-sulphide ores has been induced by mineral processing improvement and leads to new exploration and mining projects in the world. Although the mineralogy is often precisely known, and despite several studies linking ore deposition to regional tectonics, absolute dating of non-sulphide stages is rare and structure of ore bodies was largely disregarded. Geochronological data from non-sulphide ores are essential to timely constrain alteration episodes and to insert supergene ore genesis in the climate and tectonic evolution of the metallogenic province. The access to internal organization of ore could reveal post-mineralization episodes related to supergene evolution. Thus, a rock magnetism study combining anisotropy of magnetic susceptibility (AMS) and palaeomagnetism was performed on four non-sulphide deposits from the Moroccan High Atlas. AMS generally shows similar horizontal magnetic fabrics for ores and the clayey and carbonaceous internal sediments filling karstic cavities. The palaeomagnetic directions of ores and internal sediments are compatible, and the calculated poles are consistent with the last 30 Ma of the Africa apparent polar wander path, with an upper age at 0.78 Ma. The proposed three-step scenario is placed within the evolution of the Moroccan High Atlas belt. Deposition of primary sulphides is contemporaneous with opening of the Tethyan and Atlantic oceans. During the Tertiary, intracontinental deformation gave rise to the High Atlas fold-and-thrust belt and to regional uplift. Finally, Zn-Pb sulphides hosted in carbonates experienced oxidation under an arid climate to form karst-related Zn-Pb non-sulphide ores. These promising results pave the way for an efficient method to constrain the internal fabrics and age of Zn supergene deposits