5,375 research outputs found
Modeling great depressions: the depression in Finland in the 1990s
This article is a primer on the great depressions methodology developed by Cole and Ohanian (1999, 2007) and Kehoe and Prescott (2002, 2007). We use growth accounting and simple dynamic general equilibrium models to study the depression that occurred in Finland in the early 1990s. We find that the sharp drop in real GDP over the period 1990?93 was driven by a combination of a drop in total factor productivity (TFP) during 1990?92 and of increases in taxes on labor and consumption and increases in government consumption during 1989?94, which drove down hours worked in Finland. We attempt to endogenize the drop in TFP in variants of the model with an investment sector and with terms-of-trade shocks but are unsuccessful.Depressions
Modeling Great Depressions: The Depression in Finland in the 1990s
This paper is a primer on the great depressions methodology developed by Cole and Ohanian (1999, 2007) and Kehoe and Prescott (2002, 2007). We use growth accounting and simple dynamic general equilibrium models to study the depression that occurred in Finland in the early 1990s. We find that the sharp drop in real GDP over the period 1990-93 was driven by a combination of a drop in total factor productivity (TFP) during 1990-92 and of increases in taxes on labor and consumption and increases in government consumption during 1989-94, which drove down hours worked in Finland. We attempt to endogenize the drop in TFP in variants of the model with an investment sector and with terms-of-trade shocks but are unsuccessful.
Modeling great depressions: the depression in Finland in the 1990s
This paper is a primer on the great depressions methodology developed by Cole and Ohanian (1999, 2007) and Kehoe and Prescott (2002, 2007). We use growth accounting and simple dynamic general equilibrium models to study the depression that occurred in Finland in the early 1990s. We find that the sharp drop in real GDP over the period 1990?93 was driven by a combination of a drop in total factor productivity (TFP) during 1990?92 and of increases in taxes on labor and consumption and increases in government consumption during 1989?94, which drove down hours worked in Finland. We attempt to endogenize the drop in TFP in variants of the model with an investment sector and with terms-of-trade shocks but are unsuccessful.Depressions
Open-beauty production in Pb collisions at =5 TeV: effect of the gluon nuclear densities
We present our results on open beauty production in proton-nucleus collisions
for the recent LHC Pb run at =5 TeV. We have analysed the
effect of the modification of the gluon PDFs in nucleus at the level of the
nuclear modification factor. Because of the absence of measurement in
collisions at the same energy, we also propose the study of the
forward-to-backward yield ratio in which the unknown proton-proton yield
cancel. Our results are compared with the data obtained by LHCb collaboration
and show a good agreement.Comment: 6 pages, 3 figures, Proceedings IS2013 submitted to Nuclear Physics
Production of Neutral Pions and Eta-mesons in pp Collisions Measured with ALICE
Invariant cross sections for neutral pions and eta mesons in pp collisions at
sqrt(s) = 0.9, 2.76, and 7 TeV were measured by the ALICE detector at the Large
Hadron Collider. Next-to-leading order (NLO) perturbative QCD calculations
describe the pi0 and eta spectra at 0.9 TeV, but overestimate the measured
cross sections at 2.76 TeV and 7 TeV. The measured eta/pi0 ratio is consistent
with mT scaling at 2.76 TeV. At 7 TeV indications for a violation of mT scaling
were found.Comment: 4 pages, 2 figures, to appear in the proceedings of the XXII
International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions,
Quark Matter 2011, Annec
Effects of salinity and B excess on the growth, photosynthesis, water relation and mineral composition of laurustinus grown in greenhouse
Trabajo presentado en el XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Greenhouse 2010 and Soilless Cultivation, celebrado en Lisboa, Portugal, del 22 al 27 de agosto de 2010A greenhouse study was conducted to determine the interactive effects of NaCl
salinity and boron on the growth, plant water status, gas exchange, chlorophyll
fluorescence and concentrations of sodium (Na), chloride (Cl) and boron (B) in
laurustinus (Viburnum tinus L.). Potted plants were grown in a factorial
combination of salinity (2 and 6 dS m-1) and boron (1 and 6 mg L-1). Plant dry
weight (DW) decreased with salinity and B excess, particularly as a result of the
former. The salinity × B interaction on the plant DW was not significant (additive
effects). Salinity increased Na and Cl concentrations in leaf (20 and 35 mg g-1 DW,
respectively) resulting in foliar injury. The application of 6 mg L-1 of B (B toxicity or
B excess) produced injury symptoms in old leaves (leaf tip and edge burn). Salinity
and B toxicity led to leaves dropping, especially the former. B toxicity led to higher B
concentrations in insured leaves (1385 mg kg-1 DW) and salinity reduced it to 425 (B
x NaCl antagonistic effect). Boron excess did no alter Na and Cl concentrations in
leaf. Salinity decreased stomatal conductance (gs) as a regulatory mechanism against
osmotic stress, which resulted in a dropping photosynthesis (Pn). Leaf water
parameters were only affected by salinity, which enhanced a process of osmotic
adjustment and improving the plant water status. Salt-stressed plants showed an
adaptive response to salinity, which decreased gs, Pn and quantum yield of
photosystem II (éPSII), and dissipated the excess radiant energy as heat (increased
non-photochemical quenching [NPQ]). The combination of salinity and B excess
maintained éPSII and decreased the effectiveness of stomatal regulation, NPQ and
Pn. This caused the lowest plant DW and suggests disorders in electron transport
(photorespiration). Our findings suggest that: (1) laurustinus is a B excess sensitive
species, (2) salinity reduced the accumulation of B in leaves of the B excess stressed
plants but was not enough to prevent injuries in PSII, and (3) B excess or/and
salinity provide plants of poor commercial quality.This research was supported by CICYT projects (CICYT AGL2008-05258-CO2-
1-AGR and CICYT AGL2008-05258-CO2-2-AGR), SENECA project (08669/PI/08) and
by the Consejería de Agricultura y Agua de la Región de Murcia, program (UPCTCEBAS-
IMIDA 2008).Peer Reviewe
Impact of a cognitive stimulation program on the reading comprehension of children in primary education
Introduction: At present, numerous studies can be found in which influences
and relationships between the principal executive functions, reading
comprehension, and academic performance associated with reading are
reported. However, there is still a lack of convergence regarding the impact of
computerized cognitive training on children’s executive development and its
transfer in academic reading performance and comprehension of written texts.
Methods: This study analyzes the effect of implementing a cognitive
stimulation program on the performance of reading comprehension and
academic performance in the subject of Spanish Language and Literature. To
this end, a total sample of 196 children from 23 educational centers received
the cognitive intervention for 8 weeks, with three weekly sessions of between
15 and 20 min each occurring on non-consecutive days. Pre-test and posttest measurements were collected and analyzed.
Results: The results demonstrate a significant increase in the reading
comprehension scores. In addition, a significant impact of the training on
the participants’ academic performance in the subject Spanish Language and
Literature was found.
Discussion: These results highlight the usefulness of computerized cognitive
stimulation programs for reading comprehension enhancement
Prompt Photon Identification in the ALICE Experiment: The Isolation Cut Method
Submitted for publication in NIMThe ALICE experiment at LHC will detect and identify prompt photons and light neutral mesons with the PHOS and EMCal detectors. Charged particles will be detected and identified by the central tracking system. In this paper, a method to identify prompt photons and to separate them from the background of hadrons and decay photons in PHOS with the help of isolation cuts is presented
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