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. With stratified sampling, we show how the difference in objective functions should be weighted in order to obtain a …
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statistics developed in Satorra and Bentler (1988a,b). The theory is framed in the general context of multisample analysis of …
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The behaviour of group sequential tests in the two-sample problem is investigated if one replaces the classical non-robust estimators in the t-test statistic by modern robust estimators of location and scale. Hampel's 3-part redescending M-estimator 25A used in the Princeton study and the robust...
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In the context of high-frequency financial data it is often assumed that sampling times are exogenous. This entails … that financial asset prices, sampled on a grid of trade instants, are independent from the sampling times. We derive … sampling time endogeneity in relation to both the efficient and the noise components of the observed price. Using a vast …
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