搜索结果: 1-1 共查到“政治学 Recent Trends”相关记录1条 . 查询时间(0.062 秒)
Investigating Recent Trends in the U.S. Teen Birth Rate
U.S. Teen Birth Rate Recent Trends
2015/9/21
We investigate trends in the U.S. rate of teen childbearing between 1981 and 2010, giving particular attention to the sizable decline that has occurred since 1991. Our primary focus is on establishing...