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Neurogenesis and apoptosis occur contemporaneously in the postnatal hippocampal dentate gyrus and have been implicated in mood and cognitive disorders. Particularly, neurogenesis correlates with the manifestation of antidepressant effects, but its quantitative and topographical relationship with concomitant cell death has not been investigated. Accordingly,(More)
Understanding the mechanisms that regulate postnatal neurogenesis is becoming increasingly relevant since its modulation has been implicated in the pathogenesis of certain neuropsychiatric disorders. Lithium is a mood stabilizer known to increase hippocampal neurogenesis. Lithium also results in increased levels of the angiogenic factor vascular endothelial(More)
Differentiation of the presynaptic terminal is a complex and rapid event that normally occurs in spatially specific axonal regions distant from the soma; thus, it is believed to be dependent on intra-axonal mechanisms. However, the full nature of the local events governing presynaptic assembly remains unknown. Herein, we investigated the involvement of the(More)
In this paper, we examine parameter identi…cation in the hybrid speci…cation of the New Keynesian Phillips Curve proposed by Gali and Gertler (1999). We employ recently developed moment-conditions inference procedures, which provide a more e¢ cient and reliable econometric framework for the analysis of the NKPC. In particular, we address the issue of(More)
We study the determinants of Credit Default Swap (CDS) spreads through quantile regressions. In addition to traditional variables, the results indicate that CDS spreads are also determined by illiquidity costs. However, contrary to stocks or bonds, we show that CDS transaction costs should be measured by absolute, rather than relative, bid-ask spreads.(More)
Model averaging (MA) estimators in the linear instrumental variables regression framework are considered. The obtaining of weights for averaging across individual estimates by direct smoothing of selection criteria arising from the estimation stage is proposed. This is particularly relevant in applications in which there is a large number of candidate(More)
JEL Classification: C22 C52 G15 Keywords: Financial markets Financial integration Long run analysis Local nonstationarity Markov switching a b s t r a c t International equity markets linkages are characterized by nonlinear dependence and asymmetries. We investigate shifts in long run comovements in stock markets by means of an 'interrupted' Markov(More)
Money demand specifications exhibits instability, especially for long spans of data. This paper reconsiders the welfare cost of inflation for the US economy using a flexible timevarying cointegration methodology to estimate the money demand function. We find evidence that the time-varying cointegration estimation provides a better fit of the actual data(More)
We reexamine the empirical relevance of the cost channel of monetary policy (e.g. Ravenna and Walsh, 2006), employing recently developed moment-conditions inference methods , including identi…cation-robust procedures. Using US data, our results suggest that the cost channel e¤ect is poorly identi…ed and we are thus unable to corroborate the previous results(More)