Search results for "O4"
showing 10 items of 142 documents
Monopolistic competition and different wage setting systems
2010
In this paper, we present a disequilibrium unemployment model without labor market frictions and monopolistic competition in the goods market within an infinite horizon model of growth. We consider different wage setting systems and compare wages, the unemployment rate, and income per capita in the long-run at firm, sector, and national (centralized) levels. The aim of this paper is to determine under which conditions, the inverted-U hypothesis between unemployment and the degree of centralization of wage bargaining, reported by Calmfors and Driffill [Economic Policy, 6, 14¿61, 1988], is confirmed. Our analysis shows that a high degree of market power normally produces the inverted-U shape …
Renewable electricity producing technologies and metal depletion: A sensitivity analysis using the EROI
2015
International audience; More and more attention is being paid to renewable technologies because they are seen as a great opportunity to disengage our society from its dependence on fossil fuels. Such flow-based energy resources that rely on solarenergy are supposed to lead us toward a sustainable energy future. However, because of their high capitalintensity, renewable technologies require large amounts of matter, including both common and rare metals.These metals require energy for their production, and more specifically for their extraction. The energy costassociated with metal extraction is linked to mineral ore grade, meaning that as depletion progresses, energycost increases. In additi…
Product and Labour Market Regulations, Production Prices, Wages and Productivity
2016
ACLN; International audience; This study is an attempt to evaluate the effects of product and labour market regulations on industry productivity through their various impacts on changes in production prices and wages. In a first stage, the estimation of a regression equation on an industry*country panel, with controls for country*industry and country*year fixed effects, show that multi-factor productivity is negatively and significantly influenced by both indicators of industrial prices from same industry and weighted average of industrial prices from other industries, and by indicators of country wages weighted by industry labour shares for low and high skilled workers. In a second stage, …
The preparation and evaluation of core-shell magnetic dummy-template molecularly imprinted polymers for preliminary recognition of the low-mass polyb…
2020
Abstract The design, preparation process, binding abilities, morphological characteristic and prospective field of application of dummy-template magnetic molecularly imprinted polymer (DMMIP) for preliminary recognition of the selected low-mass polybrominated diphenyl ethers (PBDE-47 and PBDE-99) from aquatic environment were investigated. The surface of iron oxide (Fe3O4) nanopowder (50–100 nm particles size) was modified with tetraethoxysilane and next prepared Fe3O4@SiO2 particles were dispersed in anhydrous toluene functionalized by (3-aminopropyl)triethoxysilane. Finally, MIPs' thin film layer on the surface of Fe3O4@SiO2@NH2 was formed in acetonitrile as a solvent solution, using ethy…
The economic impact of migration: productivity analysis for Spain and the UK
2012
Over the past 20 years labour has become increasingly mobile and whilst employment and earnings effects in host countries have been extensively analysed, the implications for firm and industry performance have received far less attention. This paper explores the direct economic consequences of immigration on host nations’ productivity performance at a sectoral level in two very different European countries, Spain and the UK. Whilst the UK has traditionally seen substantial immigration, for Spain the phenomenon is much more recent. Our findings from a growth accounting analysis show that migration has made a negative contribution to labour productivity growth in Spain and a negative but negl…
R&D Offshoring and the Productivity Growth of European Regions
2013
The recent increase in R&D offshoring have raised fears that knowledge and competitiveness in advanced countries may be at risk of `hollowing out\'. At the same time, economic research has stressed that this process is also likely to allow some reverse technology transfer and foster growth at home. This paper addresses this issue by investigating the extent to which R&D offshoring is associated with productivity dynamics of European regions. We find that offshoring regions have higher productivity growth, but this positive effect fades down with the number of investment projects carried out abroad. A large and positive correlation emerge between the extent of R&D offshoring and the home reg…
Spin crossover behavior in a series of iron(III) alkoxide complexes.
2015
The synthesis, crystal structures, magnetic behavior, and electron paramagnetic resonance studies of five new FeIII spin crossover (SCO) complexes are reported. The [FeIIIN5O] coordination core is constituted of the pentadentate ligand bztpen (N5) and a series of alkoxide anions (ethoxide, propoxide, n-butoxide, isobutoxide, and ethylene glycoxide). The methoxide derivative previously reported by us is also reinvestigated. The six complexes crystallize in the orthorhombic Pbca space group and show similar molecular structures and crystal packing. The coordination octahedron is strongly distorted in both the high- and low-temperature structures. The structural changes upon spin conversion ar…
FOTOHROMĀ EFEKTA IZCELSME AR DZELZI AKTIVĒTĀ BĀRIJA MAGNIJA SILIKĀTĀ
2022
BaMgSiO4:Fe ir viens no visizteiksmīgākajiem neorganiskajiem fotohromiem materiāliem, tomēr fotohromā efekta izcelsme BaMgSiO4:Fe nav viennozīmīgi izskaidrota. Darbā ir sintezēti BaMgSiO4:Fe paraugi, un tie ir pētīti ar difūzās atstarošanās optiskās spektroskopijas un elektronu paramagnētiskās rezonanses (EPR) spektroskopijas metodēm. Darbā apspriesta fotohromā efekta izcelsme BaMgSiO4:Fe, kā arī noteikta optimālā Fe koncentrācija un sintēzes apstākļi efekta pastiprināšanai.
FeCr2O4 synthetic spinel: heating experiments and oxidation kinetics
2011
Gallija oksīdu saturošu kodola-apvalka nanovadu heterostruktūru sintēze
2021
Darbā tika pētītas un attīstītas fizikālās metodes Ga2O3 nanovadu (NW) audzēšanai un Ga2O3 saturošu NW kodola-apvalka heterostruktūru izveidei ar ķīmisko tvaiku transportu un ar atomāru slāņu kondensācijas (ALD) izveidota slāņa atkvēlināšanu. Eksperimentu laikā iegūtās nanostruktūras raksturoja ar skenējošo un transmisijas elektronu mikroskopu, rentgendifrakciju un enerģētiski dispersīvo rentgenstaru spektroskopiju. Darbs sastāv no literatūras apskata, eksperimentālās daļas, rezultātu analīzes un diskusijas un secinājumu daļas. Darba centrālais pētījuma objekts bija Ga2O3 nanovadi. Ga2O3 šobrīd ir aktīvi pētīts pusvadītājs ar 4.9 eV platu aizliegto zonu un optisko caurlaidību redzamajā gais…