全文获取类型
收费全文 | 17345篇 |
免费 | 185篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2235篇 |
民族学 | 154篇 |
人才学 | 3篇 |
人口学 | 3050篇 |
丛书文集 | 389篇 |
教育普及 | 1篇 |
理论方法论 | 1142篇 |
综合类 | 1317篇 |
社会学 | 6875篇 |
统计学 | 2365篇 |
出版年
2023年 | 32篇 |
2021年 | 52篇 |
2020年 | 91篇 |
2019年 | 119篇 |
2018年 | 1781篇 |
2017年 | 1853篇 |
2016年 | 1218篇 |
2015年 | 123篇 |
2014年 | 196篇 |
2013年 | 870篇 |
2012年 | 515篇 |
2011年 | 1456篇 |
2010年 | 1231篇 |
2009年 | 996篇 |
2008年 | 1053篇 |
2007年 | 1184篇 |
2006年 | 211篇 |
2005年 | 569篇 |
2004年 | 797篇 |
2003年 | 475篇 |
2002年 | 341篇 |
2001年 | 161篇 |
2000年 | 199篇 |
1999年 | 147篇 |
1998年 | 109篇 |
1997年 | 89篇 |
1996年 | 123篇 |
1995年 | 70篇 |
1994年 | 62篇 |
1993年 | 89篇 |
1992年 | 90篇 |
1991年 | 104篇 |
1990年 | 79篇 |
1989年 | 80篇 |
1988年 | 74篇 |
1987年 | 71篇 |
1986年 | 66篇 |
1985年 | 79篇 |
1984年 | 71篇 |
1983年 | 71篇 |
1982年 | 44篇 |
1981年 | 41篇 |
1980年 | 38篇 |
1979年 | 47篇 |
1978年 | 39篇 |
1977年 | 34篇 |
1976年 | 34篇 |
1975年 | 33篇 |
1974年 | 40篇 |
1973年 | 29篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
171.
Levina T 《Vestnik statistiki (Moscow, Russia : 1949)》1992,(1):10-15
Demographic trends in rural areas of the former Soviet Union are analyzed over the 10-year period 1979-1989, using census data. Over the whole country, the rural population decreased by 1 percent, while the urban population increased by 15 percent, although significant differences existed between the European and Central Asian republics. Factors affecting the dynamics of rural populations are analyzed, including the undeveloped social and economic infrastructure in rural areas. 相似文献
172.
Merrick TW 《Population bulletin》1986,41(2):1-52
The world's population growth rate peaked at slightly over 2%/year in the late 1960s and in 1986 is down to 1.7% and falling. Annual numbers added continue to rise because these rates apply to a very large base, 4.9 billion in 1986. According to UN medium variant projections, world population growth will peak at 89 million/year in the late 1990s and then taper off until world population stabilizes in the late decade of the 21st century at about 10.2 billion. Close to 95% of this growth is occurring in less developed countries (LDCs) of Africa, Asia (minus Japan), and Latin America. LDC fertility rates are declining, except in sub-Saharan Africa and parts of Latin America and South Asia, but most have far to go to reach the replacement level of 2.1 births/woman. Fertility is below replacement in virtually all more developed countries. For LDCs, large numbers will be added before stabilization even after attainment of replacement level fertility because of the demographic momentum built into their large and young population bases. This complicates efforts to bridge gaps between living standards in LDCs and industrialized countries. From a new debate about whether rapid population growth deters or stimulates economic growth, a more integrated view has emerged. This view recognizes the complementary relationship between efforts to slow population growth and other development efforts; e.g., to improve health and education, upgrade women's status, increase productivity. Most effective in the increased contraceptive prevalence and fertility declines seen in many LDCs has been the combination of organized programs to increase access to family planning information and supplies with socioeconomic development that enhances the desire for smaller families. 相似文献
173.
The China Population information Centre (CPIC), set up in May 1980, is a national institution for population information research under the State Family Planning Commission. Its main functions are to 1) collect, process, and distribute and foreign materials on population and family planning; 2) collect, tabulate, and analyze population and family planning data; 3) keep abreast of new population and family planning developments within and outside the country; 4) edit and publish information materials; and 5) provide information users with diversified services. The CPIC has 8 operational units: 1) the Library, 2) the Statistics Division, 3) the 1st Information Research Division, 4) the 2nd Information Research Division, 5) the Editorial Division, 6) the Translation Division, 7) the Computer Division, and 8) the Technical Support Division. 相似文献
174.
Slaby T 《Wiadomo?ci statystyczne (Warsaw, Poland : 1956)》1986,31(8):12-13
The application of the subjective variable to research on attitudes toward fertility in Poland is considered. The variable concerns the determination of ideal family size and attitudes toward having more children. The author shows how an ex post facto variable was constructed, describing positive, negative, and neutral feelings toward fertility during the course of a study on attitudes toward procreation. 相似文献
175.
Montgomery MR Richards T Braun HI 《Journal of the American Statistical Association》1986,81(394):297-309
This study examines the possibility that estimation of the effect of breast-feeding on infant survival is affected by selection bias, in that children who are healthier at birth may be more likely to be breast-fed. Data are from the 1976 Malaysian Family Life Survey. "Ordinary logit models for breast-feeding and survival are estimated, and the results suggest that selection is indeed present. For example, children of higher birth weight appear to be more likely to be breast-fed and likely to survive. In addition, weight at birth and the duration of breast-feeding appear to be linked." Using birth weight as an indicator for the child's health, the authors conclude that "the direct influence of breast-feeding on survival remains of overwhelming importance even after corrections for selection bias are made." 相似文献
176.
The authors describe a project, begun in 1981, to locate, list, and annotate all the published work based substantially on the census enumerators' books for nineteenth-century censuses for England and Wales. The results are currently available in a computerized file, enabling a variety of searches by topic, geographical area, and type of population. Information is provided on using the data and the computerized bibliography. The authors note that, subsequently, data for censuses of Scotland and Ireland have been added. 相似文献
177.
178.
"This paper seeks to (1) identify socioeconomic variables that are expected to generate fertility differentials; (2) hypothesize the direction and magnitude of the effect of each variable by reference to a demand-for-children model; and (3) test empirically the model using evidence from Costa Rica. The estimates are obtained from a ten-percent systematic random sample of all Costa Rican individual-family households. There are 15,924 families in the sample...." The authors specifically seek "to capture the effects of changing relative prices and available income and time constraints on parental preferences for children. Least-squares estimates show statistically significant relationships between household fertility and opportunity cost of time, parental education, occurrence of an extended family, medical care, household sanitation, economic sector of employment, and household stock of nonhuman capital." 相似文献
179.
The economic adaptation of immigrants to Canada is analyzed using government data on the labor force and landed immigrants. In particular, the labor force experience of a sample of immigrants in Canada is examined and compared with that of a Canadian cohort with regard to length of unemployment and income. "Differences in unemployment and insurable earnings are examined by age, sex, immigrant category..., world area of last permanent residence, official language abilities, education, and region of residence." (summary in FRE, SPA) 相似文献
180.