The 20th century witnessed the birth of modern family planning and its effects on the fertility of hundreds of millions of couples around the world. In 1979, China formally initiated one of the world’s strictest family planning programs-the "one child policy." Despite its obvious significance,...

The empirical evidence on the cross-sectional relation between idiosyncratic risk and expected stock returns is mixed. We demonstrate that the omission of the previous month's stock returns can lead to a negatively biased estimate of the relation. The magnitude of the omitted variable bias...