Demographic methods and techniques are powerful tools to quantitatively analyse and understand the phenomenon of population. However, the scientifi c methods an
<正>Recently, a story is spreading among Beijing people. During the rush hours everyday, a man would drive a Mercedes-Benz to offer free rides to strangers at b
<正>Central Committee of the Communist Party of China and the State Council recently issued'Opinion on adjustment and Improvement of fertility policies'
After tlle new policy issued, each province has to estimate tlhe potential birtIh and fertility caused by the new fertility policy in order to prepare for the i