Plant level productivity in the ready-mix concrete sector is highly dispersed, whereby a plant in the 90th percentile of the distribution produces twice the value added than a plant in the 10th percentile. Is the magnitude of this dispersion real or simply an artifact of mea- surement error?...

This paper uses a new data set on domestic child adoption to document the preferences of potential adoptive parents over born and unborn babies relinquished for adoption by their birth mothers. We show that adoptive parents exhibit significant biases in favor of girls and against...