Search results for "F12"
showing 10 items of 53 documents
¿Qué historia enseñar?
2005
Un grupo de estudiantes norteamericanos de ciencia política, que se han sumado al movimiento iniciado por los estudiantes de economía que piden una enseñanza más cercana a la realidad, lo ha dicho con una frase que me parece un principio enteramente válido para los historiadores: “Es el problema el que dicta el método; no el método el problema”. Lo que es inadmisible es que la adopción de una escuela y de una metodología nos lleve a analizar los problemas con ópticas sectoriales que sólo pueden darnos una visión sesgada de una realidad demasiado compleja para reducirla a una perspectiva unilateral. Con esta retirada a la que me he referido, los historiadores nos hemos alejado de los problem…
Effects of a structured educational intervention in moderate-to-severe elderly asthmatic subjects.
2019
Background: Adherence to inhaled drugs is linked to patients’ satisfaction with their device, and an incorrect use can negatively affect the outcomes of asthma treatment. We speculated that this is particularly true in elderly asthmatic subjects. Aim: We performed a national pre-post interventional multicentre study, enrolling moderate-to-severe asthmatic subjects aged ≥65 years treated with fixed inhaled combination drugs by dry powder inhaler (DPI) or pressurized metered dose inhaler (pMDI). Adherence and critical errors were evaluated by means of validated questionnaires at first visit (V1) and after 3–6 months (V2). At V1, subjects underwent intensive training on the correct use of the…
PARAMETER ESTIMATION FOR FRACTIONAL ORNSTEIN-UHLENBECK PROCESSES: NON-ERGODIC CASE
2011
We consider the parameter estimation problem for the non-ergodic fractional Ornstein-Uhlenbeck process defined as $dX_t=\theta X_tdt+dB_t,\ t\geq0$, with a parameter $\theta>0$, where $B$ is a fractional Brownian motion of Hurst index $H\in(1/2,1)$. We study the consistency and the asymptotic distributions of the least squares estimator $\hat{\theta}_t$ of $\theta$ based on the observation $\{X_s,\ s\in[0,t]\}$ as $t\rightarrow\infty$.
MODERATE DEVIATION PRINCIPLES FOR KERNEL ESTIMATOR OF INVARIANT DENSITY IN BIFURCATING MARKOV CHAINS MODELS
2021
Bitseki and Delmas (2021) have studied recently the central limit theorem for kernel estimator of invariant density in bifurcating Markov chains models. We complete their work by proving a moderate deviation principle for this estimator. Unlike the work of Bitseki and Gorgui (2021), it is interesting to see that the distinction of the two regimes disappears and that we are able to get moderate deviation principle for large values of the ergodic rate. It is also interesting and surprising to see that for moderate deviation principle, the ergodic rate begins to have an impact on the choice of the bandwidth for values smaller than in the context of central limit theorem studied by Bitseki and …
CENTRAL LIMIT THEOREM FOR KERNEL ESTIMATOR OF INVARIANT DENSITY IN BIFURCATING MARKOV CHAINS MODELS
2021
Bifurcating Markov chains (BMC) are Markov chains indexed by a full binary tree representing the evolution of a trait along a population where each individual has two children. Motivated by the functional estimation of the density of the invariant probability measure which appears as the asymptotic distribution of the trait, we prove the consistence and the Gaussian fluctuations for a kernel estimator of this density based on late generations. In this setting, it is interesting to note that the distinction of the three regimes on the ergodic rate identified in a previous work (for fluctuations of average over large generations) disappears. This result is a first step to go beyond the thresh…
CENTRAL LIMIT THEOREM FOR BIFURCATING MARKOV CHAINS
2020
Bifurcating Markov chains (BMC) are Markov chains indexed by a full binary tree representing the evolution of a trait along a population where each individual has two children. We first provide a central limit theorem for general additive functionals of BMC, and prove the existence of three regimes. This corresponds to a competition between the reproducing rate (each individual has two children) and the ergodicity rate for the evolution of the trait. This is in contrast with the work of Guyon (2007), where the considered additive functionals are sums of martingale increments, and only one regime appears. Our first result can be seen as a discrete time version, but with general trait evoluti…
Modernités dans les Amériques : des avant-gardes à aujourd’hui
2018
Reposer aujourd’hui la question de la modernité – littéraire, artistique, sociale ou politique – revient à employer le mot au pluriel. Ce choix implique que l’on ne se réduise pas au terme plurivoque, et souvent ambigu, de modernisme. Ce dernier, souvent convoqué pour désigner l’imaginaire culturel de la modernité, peine à rendre compte des écarts qui se manifestent dans la manière de penser le rapport au temps, à l’histoire et à la culture. « La modernité n’est pas un mouvement, comme dada o...
Una política juvenil para promover el desarrollo local: un estudio de caso
2019
El artículo presenta un estudio de caso de una política juvenil realizada en la última década en una región del Sur de Italia. Su interés reside en la versatilidad, el enfoque multidimensional y en el hecho de haber actuado como un óptimo instrumento de desarrollo local. El estudio de caso se ha realizado a través del análisis documental de las evaluaciones ex -ante, durante y ex – post que se hicieron para valorar el impacto de la política. La reflexión que el caso propone se enfoca en cómo se puede promover eficazmente el desarrollo local a través de políticas más trasversales.
Los maestros españoles de los «niños de Morelia» nuevas aportaciones
2003
On the performance of the Spanish teachers that accompanied the so called «Children of Morelia» expedition, the specialists that have dealt with the topic so far have made a severe negative judgment. In this work we bring to light, for the first time and through unpublished documentation, the repeated initiatives that these teachers took to try to complete their guardian mission, which could not be carried out completely due to the position of the Mexican authorities.<br><br>Sobre la actuación de los maestros españoles que acompañaron a la expedición de los «niños de Morelia», se ha formado un severo juicio negativo por parte de los especialistas que han tratado el tema. En este…
''Dual'' gravity: Using spatial econometrics to control for multilateral resistance.
2007
We propose a quantity-based `dual' version of the gravity equation that yields an estimating equation with both cross-sectional interdependence and spatially lagged error terms. Such an equation can be concisely estimated using spatial econometric techniques. We illustrate this methodology by applying it to the Canada-U.S. data set used previously, among others, by Anderson and van Wincoop (2003) and Feenstra (2002, 2004). Our key result is to show that controlling directly for spatial interdependence across trade flows, as suggested by theory, significantly reduces border effects because it captures `multilateral resistance'. Using a spatial autoregressive moving average specification, we …