Search results for "ALK"
showing 10 items of 4314 documents
Walking on exoplanets: Is Star Wars right?
2016
As the number of detected extrasolar planets increases, exoplanet databases become a valuable resource, confirming some details about planetary formation, but also challenging our theories with new unexpected properties.
The Magmatic to Hydrothermal Evolution of the Intrusive Mont Saint-Hilaire Complex: Insights into the Late-stage Evolution of Peralkaline Rocks
2017
The Cretaceous Mont Saint-Hilaire complex (Quebec, Canada) comprises three major rock units that were emplaced in the following sequence: (I) gabbros; (II) diorites; (III) diverse partly agpaitic foid syenites. The major element compositions of the rock-forming minerals, age-corrected Nd and oxygen isotope data for mineral separates and trace element data of Fe-Mg silicates from the various lithologies imply a common source for all units. The distribution of the rare earth elements in clinopyroxene from the gabbros indicates an ocean island basalt type composition for the parental magma. Gabbros record temperatures of 1200 to 800 degrees C, variable silica activities between 0 center dot 7 …
SECULAR MEAN REVERSION AND LONG-RUN PREDICTABILITY OF THE STOCK MARKET
2016
Empirical financial literature documents the evidence of mean reversion in stock prices and the absence of out-of-sample return predictability over periods shorter than 10 years. The goal of this paper is to test the random walk hypothesis in stock prices and return predictability over periods longer than 10 years. Specifically, using 141 years of data, this paper begins by performing formal tests of the random walk hypothesis in the prices of the real S&P Composite Index over increasing time horizons up to 40 years. Even though our results cannot support the conventional wisdom which says that the stock market is safer for long-term investors, our findings speak in favor of the mean revers…
Technological change and wage premiums amongst high-skilled labour
2019
This study examines the impact of the steam engine, which produced wide and long-lasting economic growth from the 19th century to the early 20th century, on the wages of high-skilled seamen in the Swedish merchant maritime shipping industry. The analysis focuses on the years 1869–1914, which was a transition period during which traditional sailing ships were replaced by steam-powered vessels. The study shows that all high-skilled occupations received wage gains under steam technology. The evidence on wage polarization amongst the high-skill occupations remains subtle, although there is certain evidence that wage premiums vary by occupation. peerReviewed
Establishment size and task-specific wages: Evidence from historical contract data
2014
This study examines whether task-specific jobs are rewarded differently across establishments of different sizes and whether these rewards vary across distinct technologies. We found that the aggregate premium estimates on the impact of size on wages conceal significant differences between tasks and technologies and that these differences reflect unobserved individual heterogeneity. The role of self-selection of more productive workers into larger establishments is particularly substantial in the case of abstract tasks. peerReviewed
Some evidence of random walk behavior of Euro exchange rates using ranks and signs
2005
Abstract This study utilises recently developed tests based on ranks and signs, in addition to the traditional variance ratio test, to examine the behavior of Euro exchange rates. We show that adjustments for multiple tests must be employed in order to avoid size distortions. Overall, such adjustments provide evidence consistent with random walk behavior of Euro exchange rates.
L’analisi della conversazione istituzionale: applicazioni e prospettive
2015
La Conversation Analysis si occupa del parlato quotidiano, di interazioni comunicative qualsiasi, tra amici o sconosciuti, tra commesso e cliente, insegnante e allievi, terapeuta e paziente. Gli esempi delle applicazioni potrebbero essere infiniti, dato che la conversazione e le sue varianti "istituzionali", come l’intervista o il dibattito, costituiscono la forma di comunicazione più immediata e diffusa. Nell'articolo l’autrice introduce alla Analisi della Conversazione, ne illustra gli aspetti di base, ne mostra le applicazioni alle interazioni comunicative istituzionali e propone una sinergia interdisciplinare a partire da un nucleo sociologico con indicazioni operative e prospettive per…
Testing for random walk in euro exchange rates using the subsampling approach
2010
This study utilizes variance ratio tests based on the subsampling approach to test the behaviour of euro-based exchange rates markets. Results are mixed, although the random walk behaviour is dominant among the three major currencies namely the Japanese yen, the US dollar and the British pound.
No linealidad y asimetría en el proceso generador del Índice Ibex35
2013
This paper analyzes the behavior of Ibex35 from January 1999 to December 2001, in order to check if it follows a different process from random walk so its return is not a white noise and it can be predictable, against the efficient market hypothesis. For that, a nonlinear generating process of return will be considered and a STAR-APARCH model will be specified. This model allows a nonlinear behavior in the conditional mean and in the conditional variance. The empirical results show that the Ibex35 follows a nonlinear and asymmetric process, both in the conditional mean as in the conditional variance, so the weak-version of efficient market hypothesis is rejected. El trabajo analiza el compo…
More skilled, better paid : labour-market returns to postsecondary vocational education
2017
Outside the USA, relatively little is known about the labour-market returns to postsecondary vocational (or polytechnic) education. Yet, polytechnics in Europe are distinct from US community colleges. This paper focuses on the labour-market returns to polytechnic attendance in Finland, where polytechnics are representative of many European countries. Using matching methods and longitudinal administrative data, we find that, compared to individuals with no postsecondary education, students who attend polytechnics have higher annual earnings of €3,300 to €3,700 and employment gains of 2.5 to 6.6 percentage points 10 years after the entry decision. However, the returns vary by personal charact…