共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
油价一路攀升,让长期以来使用燃油供暖的瑞典人,为度过2005年这个特别寒冷的冬天付出了不菲的代价.正当人们望"油"兴叹时,瑞典政府在近期宣布,要在2020年告别"石油经济",成为全球第一个不依赖石油的国家. 相似文献
5.
6.
7.
8.
9.
A.R. Gross 《发展研究杂志》2013,49(1):99-112
This article analyses a Stackelberg differential game in which households' labour supply and fertility decisions are taken assuming husbands as leaders and wives as followers. The model solution yields the optimal number of children and labour supply of male and female. In equilibrium male and female labour supply increases with wage and decreases with children costs and time preference, and the optimal number of children increases with male wage and decreases with cost of children, husband's time preference, and female's wage and time preference. We test the model using Ghana Living Standard Survey Round 4 and find that women are more sensitive to changes in the labour market conditions than males, and better labour market opportunities for women may lead to a strong reduction in fertility. 相似文献
10.
11.
12.
13.
14.
15.
16.
17.
18.
网络游戏成瘾对青少年越轨行为的加剧及对策 总被引:3,自引:0,他引:3
近年来,青少年网络游戏成瘾的现象越来越严重。这种现象又对青少年越轨行为起到了加剧作用。青少年网络游戏成瘾具有内部、外部两个方面的原因。因此我们也应从这两个方面采取措施,实施对策,以保证青少年的健康成长,以预防更多青少年犯罪的发生。 相似文献
19.