SOURCES OF JOB INFORMATION FOR MIGRANTS

Labor and Human Capital,

Reductions of Hidden Information Sources

In all but special circumstances, measurements of time-dependent processes reflect internal structures and correlations only indirectly. Building predictive models of such hidden information sources requires discovering, in some way, the internal states and mechanisms. Unfortunately, there are often many possible models that are observationally equivalent. Here we show that the situation is not as arbitrary as one would think. We show that generators of hidden stochastic processes can be reduced to a minimal form and compare this reduced representation to that provided by computational mechanics--the epsilon-machine. On the way to developing deeper, measure-theoretic foundations for the latter, we introduce a new two-step reduction process. The first step (internal-event reduction) produces the smallest observationally equivalent sigma-algebra and the second (internal-state reduction) removes sigma-algebra components that are redundant for optimal prediction. For several classes of stochastic dynamical systems these reductions produce representations that are equivalent to epsilon-machines.Comment: 12 pages, 4 figures; 30 citations; Updates at http://www.santafe.edu/~cm

SOURCES OF INFORMATION FOR COMMERCIAL FARMS: USEFULNESS OF MEDIA AND PERSONAL SOURCES

The usefulness of several information sources is examined for U.S. farms with sales in excess of $100,000. The results indicate that crop/livestock-specific magazines and general farm magazines are the most useful information sources. Analyses indicate that the types and number of different commodities that the farm produced, as well as Internet use, are the most consistent predictors of attitudes toward various information sources. However, characteristics that explain attitudes toward different information sources vary substantially across the information sources considered.Farm Management,

Sources of identifying information in evaluation models

Estimation

The information sources of the first Spanish Newspapers (1618-1635): the construction of information credibility

Este trabajo analiza las fuentes de información utilizadas en un corpus numeroso de avisos recogidos en periódicos españoles impresos entre 1618 y 1635. El objetivo de partida es determinar cómo se construye, en términos tanto históricos como retóricos, la credibilidad informativa. Analizaremos la construcción retórica de la credibilidad en el texto mismo de los avisos, concretamente en las fuentes de información que estos declaran u ocultan; para comprobar si existe una intención deliberada de encubrir las fuentes de información, estudiaremos la frecuencia con que aparece la atribución on deep background. La aproximación metodológica que orienta este estudio es la que sostiene el Historical News Discourse, que aplica las conclusiones y métodos de análisis del Análisis Crítico del Discurso a los periódicos del pasado, y contextualiza y explica sus resultados en relación a los planteamientos de la Historia del Periodismo y de la Comunicación (Conboy, Brownlees, Broersma y otros). Defendemos en este trabajo que el análisis del discurso de los primeros impresos informativos resulta fundamental para conocer cómo se consolida en España la profesión periodística, gracias a una nueva forma de auctoritas basada en la competencia discursiva. El gacetero o periodista aparece como una nueva modalidad de escritor, cuya credibilidad y reputación dependen de su capacidad para acceder, organizar y declarar –de acuerdo a patrones retóricos reconocibles para sus lectores– las fuentes de información a las que tiene acceso.This paper analyses the information sources used in a large corpus of news items published in Spanish printed newspapers between 1618 and 1635. The initial aim is to determine how information credibility was constructed in both historical and rhetorical terms. To this end, the rhetorical construction of credibility in the news stories are analysed by focusing on the information sources that these reveal or conceal. And in order to determine whether or not these sources were deliberately concealed, the frequency with which ‘on deep background’ attribution appears is examined. The methodological approach on which this study is based is Historical News Discourse, which applies the conclusions and methods of critical discourse analysis to newspapers of the past, in addition to contextualising and explaining the results in terms of journalism history and communication approaches (Conboy, Brownlees and Broersma, among others). In this work, we contend that the discourse analysis of the first printed newspapers is essential for gaining further insights into how the journalistic profession consolidated its position in Spain thanks to a new form of auctoritas based on discourse competence. The gazetteer or journalist emerged as a new kind of writer, whose credibility and reputation depended on his ability to access, organise and reveal –according to rhetorical patterns recognisable to readers– the information sources available to him