Sample Splitting and Applied Econometric Modeling
样本划分与应用计量经济建模
Often in applied econometric work, the sample of observations is split so that within each subsample the observations can reasonably be assumed to have the same parameter values. In this article I present a procedure for sample splitting that uses cluster analysis techniques. The procedure is illustrated with data from a cross-section of households obtaining subsamples with homogeneous demand parameters. The groups turn out to be determined, primarily, by occupation of the…