14,712 research outputs found

    The geography of the crisis in western Europe : national and regional impacts and policy responses

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    In the course of 2008, the countries of Western European began to experience the full impact of the global economic crisis. The financial crash was followed by a drying-up of bank liquidity and slowdown in trade. Every country saw a decline in GDP growth over successive quarters in late 2008 and the first half of 2009. During the latter part of 2009, most Western European economies saw the resumption of growth (notable exceptions were Spain and the United Kingdom), with varying predictions of the sustainability of the recovery in the course of 2010. For much of the 2008-09 period, the attention of policymakers was fixed on emergency measures to contain the effects of the crisis, notably to rescue banks in danger of collapse and to stabilise the financial sector. Various packages of crisis measures have been implemented across Western Europe, generally with the aims of stimulating consumer demand and investment and reducing the effects of the crisis on (un)employment. For the most part, the policy measures in response to the crisis have been implemented on a nationwide basis. There is however an important territorial dimension both to the effects of the crisis - only gradually becoming apparent - and the policy responses. This chapter examines the geography of the crisis in Western Europe, discussing regional impacts and regional responses. It begins with a short review of the development of the crisis, the main differences in its impact across countries and the different types of policy measures implemented to contain the effects of the crisis. The chapter then investigates the different types of regional impacts - in particular on regional unemployment rates - and the geographical characteristics of policy responses by national and regional authorities

    A geometric characterisation of Desarguesian spreads

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    We provide a characterisation of (n−1)(n-1)-spreads in PG(rn−1,q)\mathrm{PG}(rn-1,q) that have rr normal elements in general position. In the same way, we obtain a geometric characterisation of Desarguesian (n−1)(n-1)-spreads in PG(rn−1,q)\mathrm{PG}(rn-1,q), r>2r>2

    Lighting Up and Slimming Down: The Effects of Body Weight and Cigarette Prices on Adolescent Smoking Initiation

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    This paper examines the influence of body weight, body image, and cigarette prices in determining adolescent smoking initiation. Adolescents who desire to lose weight may initiate smoking as a method of appetite control. Such behavior may undermine the goals of tobacco control policies that seek to prevent smoking initiation. Using a nationally representative panel of adolescents, we show that smoking initiation is more likely among females who are overweight, who report trying to lose weight, or who describe themselves as overweight. In contrast, neither objective nor subjective measures of weight predict smoking initiation by males. Higher cigarette prices decrease the probability of smoking initiation among males but have no impact on female smoking initiation. These gender-specific differences may help explain the mixed and inconclusive evidence of the impact of price on smoking initiation found in previous literature

    Obesity, Cigarette Prices, Youth Access Laws, and Adolescent Smoking Initiation

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    This paper examines the role of body weight in smoking initiation by adolescents. We estimate discrete-time hazard models of the decision to initiate smoking using data from the Children of the National Longitudinal Survey of Youth, 1979 Cohort. We control for cigarette prices, tobacco control policies and socioeconomic factors. To avoid problems stemming from the endogeneity of body weight, we also estimate models using the method of instrumental variables. We find clear gender differences. Lighter girls are less likely to initiate smoking, while current weight is uncorrelated with initiation among boys. Among girls, smoking initiation is insensitive to cigarette prices, but among boys smoking initiation is negatively correlated with cigarette prices. These gender-specific differences may help explain the mixed evidence of the impact of price on smoking initiation found in previous literature.

    Even For Teenagers, Money Does Not Grow on Trees: Teenage Substance Use and Budget Constraints

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    This paper is about the spending choices of youth, with a particular focus on how the demand for cigarettes, alcohol and marijuana are influenced by changes in the prices of other products. Youth tend to have small incomes and limited wants, with the result that many students spend the bulk of their income on only a few items. Fast food, clothing and entertainment make up the majority of products purchased by teenagers. The hypothesis to be tested in this project is that changes in the prices of the other goods commonly bought by teenagers will affect budget allocations and thereby affect the demand for substances. We estimate own and cross price effects using the prices of cigarettes, alcohol, marijuana and other consumer products including gasoline, clothing, entertainment, and fast food. Income effects are also estimated and show that teens with higher incomes and allowances are more likely to use substances. The policy implications of the results are discussed.

    Two-dimensional state sum models and spin structures

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    The state sum models in two dimensions introduced by Fukuma, Hosono and Kawai are generalised by allowing algebraic data from a non-symmetric Frobenius algebra. Without any further data, this leads to a state sum model on the sphere. When the data is augmented with a crossing map, the partition function is defined for any oriented surface with a spin structure. An algebraic condition that is necessary for the state sum model to be sensitive to spin structure is determined. Some examples of state sum models that distinguish topologically-inequivalent spin structures are calculated.Comment: 43 pages. Mathematica script in ancillary file. v2: nomenclature of models and their properties changed, some proofs simplified, more detailed explanations. v3: extended introduction, presentational improvements; final versio

    Altered white matter connectivity associated with visual hallucinations following occipital stroke

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    Introduction: Visual hallucinations that arise following vision loss stem from aberrant functional activity in visual cortices and an imbalance of activity across associated cortical and subcortical networks subsequent to visual pathway damage. We sought to determine if structural changes in white matter connectivity play a role in cases of chronic visual hallucinations associated with visual cortical damage. Methods: We performed diffusion tensor imaging (DTI) and probabilistic fiber tractography to assess white matter connectivity in a patient suffering from continuous and disruptive phosphene (simple) visual hallucinations for more than 2 years following right occipital stroke. We compared these data to that of healthy age-matched controls. Results: Probabilistic tractography to reconstruct white matter tracts suggests regeneration of terminal fibers of the ipsilesional optic radiations in the patient. However, arrangement of the converse reconstruction of these tracts, which were seeded from the ipsilesional visual cortex to the intrahemispheric lateral geniculate body, remained disrupted. We further observed compromised structural characteristics, and changes in diffusion (measured using diffusion tensor indices) of white matter tracts in the patient connecting the visual cortex with frontal and temporal regions, and also in interhemispheric connectivity between visual cortices. Conclusions: Cortical remapping and the disruption of communication between visual cortices and remote regions are consistent with our previous functional magnetic resonance imaging (fMRI) data showing imbalanced functional activity of the same regions in this patient (Rafique et al, 2016, Neurology, 87, 1493–1500). Long-term adaptive and disruptive changes in white matter connectivity may account for the rare nature of cases presenting with chronic and continuous visual hallucinations.York University Librarie

    Subgeometries in the Andr\'e/Bruck-Bose representation

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    We consider the Andr\'e/Bruck-Bose representation of the projective plane PG(2,qn)\mathrm{PG}(2,q^n) in PG(2n,q)\mathrm{PG}(2n,q). We investigate the representation of Fqk\mathbb{F}_{q^k}-sublines and Fqk\mathbb{F}_{q^k}-subplanes of PG(2,qn)\mathrm{PG}(2,q^n), extending the results for n=3n=3 of \cite{BarJack2} and correcting the general result of \cite{BarJack1}. We characterise the representation of Fqk\mathbb{F}_{q^k}-sublines tangent to or contained in the line at infinity, Fq\mathbb{F}_q-sublines external to the line at infinity, Fq\mathbb{F}_q-subplanes tangent to and Fqk\mathbb{F}_{q^k}-subplanes secant to the line at infinity
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