| The core issue of Population Resources and Environmental Economics is how to allocate resources for material production and population production to meet the people's livelihood and reproduction needs, and as much as possible to protect the environment, promote people-centered sustainable development. Chinese population policy bases on the creed that social development needs moderate population. Reproductive choice thus transformed to national implementation of the "control population , improve population quality". From the "optimum population" point of view, this family planning policy seems rational because of rapid population growth and decline in mortality. After World War II, baby boom occurred, some countries fear that population growth and"bomb". However, the current world fertility situation has undergone a fundamental change. From the World Fertility Report data we know that the level of fertility in developed countries has generally declined since the 1970s,this low fertility levels is unprecedented. China's total fertility rate is also below replacement level for many years and the demographic dividend will disappear soon. The current policy in the Eleventh Five-Year period sticks to"to stabilize the low fertility level", and did not specify the standards to stabilize the low fertility level. Shanghai and some other cities'total fertility rate has been below 1 for many years, the long-term above or below the replacement level is not sustainable, new policy should be adopted as soon as possible in order to promote the balanced development of the population.This thesis studies the changes of China's population policy and its implications on economic and social development, Chinese population policy causes much benefit and some social and economic problems as aging, sex ratio increasing, etc. New policy should be considered as the next 5-year-plan coming soon. Ajusting population policy is feasible after 30-year policy. It's Pareto improvement to realize the TFR=2.0 Population Policy, and it will be better than the current population policy. |