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...

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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...