This article develops unbiased weighted variance and skewness estimators for overlapping return distributions. These estimators extend the variance estimation methods constructed in Bod et. al. (Applied Financial Economics 12:155-158, 2002) and Lo and MacKinlay (Review of Financial Studies...

The needs to find ways of lifting people out of poverty and to transform the existing patterns of inequality in South Africa are high on the country’s development agenda. Much hope is often vested in education as an opportunity for children from poor households to overcome the disadvantage of...

We use a time-varying copula model to investigate the impact of the introduction of the Euro on the dependence between seventeen European stock markets during the period 1994-2003. The model is implemented with a GJR-GARCH-t model for the marginal distributions and the Gaussian copula for the...

In this paper we question the existing practice of reporting enrolment statistics that ignore quality, but also quality-statistics that ignore enrolment differentials. The extant literature on education in Africa is bifurcated in that reports focus either on the quality of education or on access...

For many children around the world, access to higher education and the labour market depends on becoming fluent in a second language. This presents a challenge to education policy: when and how in the school programme should a transition to the second language occur? While a large theoretical...

School retention in South Africa and performance in the major school-leaving matric examination are characterised by significant inequalities on the basis of race and socio-economic status. In order to know at what point in the educational trajectory policy interventions and school improvement...

For many poor South African children, who are predominantly located in the historically disadvantaged part of the school system, the ongoing low quality of education acts as a poverty trap by precluding them from achieving the level of educational outcomes necessary to be competitive in the...

The impact that the systems and practices of the education authorities, as opposed to the management at the school, have on school performance is usually difficult to quantify. Provincial boundary changes occurring in South Africa after 2005 appear to create a quasi-experiment that lends itself...