The Walcheren Causeway Revisited

On a secluded plot of land reclaimed from the sea, the grateful Dutch people of Zealand have erected a monument dedicated to the 135 soldiers of the Fifth Brigade, Second Canadian Infantry Division killed or wounded in the battle of the Walcheren causeway, October 31st to November 2nd, 1944. The monument, unveiled by His Royal Highness Prince Bernard, of the Netherlands, on October 31st, 1987, in the presence of a handful of Canadian veterans, commemorates the sacrifice of the members of three regiments: The Black Watch (Royal Highland Regiment) of Canada, Le Régiment de Maisonneuve, both Montreal units, and the Calgary Highlanders. In order to appreciate the horrendous situation that the attacking infantrymen faced, one has to visualize the battle ground, a setting most likely unique for Canadian forces in the Second World War

Flypaper effect revisited: evidence for tax collection efficiency in Brazilian municipalities

The purpose of this article is to propose a reinterpretation of the traditional flypaper effect according to which central government transfers to local governments increase public spending by more than do increases in private income. Here, higher transfers from the federal government might induce less efficiency in local tax collection opposed to the income effect. Initially, we build a model in order to point out the possible existence of that flypaper effect in a context of standard maximization on the part of local governments. Next, we construct efficiency scores for Brazilian municipalities using Free Disposable Hull (FDH), taking into consideration two outputs: amount of per capita local tax collected -tax revenue- and the size of local informal economy - tax base. Last, using two stages least squares and Tobit regressions, which the instruments is built upon the rules established in the 1988 Brazilian Constitution and where we find that unconditional transfer funds to municipalities, we estimate that transfers have the opposite effect (negative) of consumer's income on efficiency of taxation, which leads us to a reinterpretation of the flypaper effect.O objetivo do artigo é propor uma reinterpretação do tradicional efeito flypaper, fenômeno que ocorre quando as transferências do governo central para os governos locais aumentam o gasto público mais do que aumentos na renda privada. Aqui as transferências mais altas podem induzir menor eficiência na coleta de impostos do que os aumentos na renda. Inicialmente construímos um modelo que aponta a possibilidade de existência de efeito flypaper no contexto de um modelo de maximização padrão por parte dos governos locais. Depois construímos scores de eficiência para os municípios brasileiros usando Free Disposable Hull (FDH), levando em consideração dois produtos: a quantidade de impostos per capita coletados localmente - receita tributária - e o tamanho da economia informal - base tributária. Finalmente, usando mínimos quadrados dois estágios e regressões Tobit, em que o instrumento é construído a partir das regras de cálculo das transferências não condicionais estabelecidas na Constituição de 1988, e onde encontramos evidência de que as transferências têm o efeito oposto (negativo) ao da renda sobre a eficiência na taxação, chegou-se à reinterpretação do efeito flypaper

On superpotentials for nonlinear sigma-models with eight supercharges

Using projective superspace techniques, we consider 4D N = 2 and 5D N = 1 gauged supersymmetric nonlinear sigma-models for which the hyper-Kahler target space is (an open domain of the zero section of) the cotangent bundle of a real-analytic Kahler manifold. As in the 4D N = 1 case, one may gauge those holomorphic isometries of the base Kahler manifold (more precisely, their lifting to the cotangent bundle) which are generated by globally defined Killing potentials. In the U(1) case, by freezing the background vector (tropical) multiplet to a constant value of its gauge-invariant superfield strength, we demonstrate the generation of a chiral superpotential, upon elimination of the auxiliary superfields and dualisation of the complex linear multiplets into chiral ones. Our analysis uncovers a N = 2 superspace origin for the results recently obtained in hep-th/0601165.Comment: 8 pages, no figures. V2: comments, references adde

Taking North American White Supremacist groups seriously: The scope and the challenge of hate speech on the internet

This article aims to address two questions: how does hate speech manifest on North American white supremacist websites; and is there a connection between online hate speech and hate crime? Firstly, hate speech is defined and the research methodology upon which the article is based is explained. The ways that ‘hate’ groups utilise the Internet and their purposes in doing so are then analysed, with the content and the functions of their websites as well as their agenda examined. Finally, the article explores the connection between hate speech and hate crime. I argue that there is sufficient evidence to suggest that speech can and does inspire crime. The article is based in the main on primary sources: a study of many ‘hate’ websites; and interviews and discussions with experts in the field

Optimal Time-Convex Hull under the Lp Metrics

We consider the problem of computing the time-convex hull of a point set under the general $L_p$ metric in the presence of a straight-line highway in the plane. The traveling speed along the highway is assumed to be faster than that off the highway, and the shortest time-path between a distant pair may involve traveling along the highway. The time-convex hull ${TCH}(P)$ of a point set $P$ is the smallest set containing both $P$ and \emph{all} shortest time-paths between any two points in ${TCH}(P)$. In this paper we give an algorithm that computes the time-convex hull under the $L_p$ metric in optimal $O(n\log n)$ time for a given set of $n$ points and a real number $p$ with $1\le p \le \infty$