[A preliminary investigation of the double-track feedback model of fertility control].
D001208:Asia; D002681:China; D003710:Demography; D003906:Developing Countries; D005202:Asia, Eastern; D005298:Fertility; D008393:Marriage; D011153:Population; D011155:Population Control; D011157:Population Dynamics; D011640:Public Policy
Asia; China; Demographic Factors; Developing Countries; Eastern Asia; Fertility--changes; Marriage; Marriage Patterns; Nuptiality--changes; Policy; Population; Population Control; Population Dynamics; Population Policy; Social Policy