A large number of studies in labor economics estimate the returns to schooling using data on monozygotic twins, under the assumption that educational attainment is random within twin pairs. This exogeneity assumption has been commonly questioned, however, but there is to date little evidence on...

A method for anticipating quarterly estimates of GDP and its main components in advance of the official publication is presented in this study. Using high-frequency information, time series equations and regression analysis, the model predicts the quarterly GDP based on three different...