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831.
The Precautionary Principle has provided the foundations for building a new risk regulatory pattern under scientific uncertainty. This paper investigates how classical economic theory may, or may not, justify the Precautionary Principle. It examines the link between irreversibility, the prospect of increasing information over time and risk management. In doing so, it brings closer the notion of option value to that of precaution. Using a general modelling framework, it identifies the conditions so that the Precautionary Principle is an efficient economic guideline. It also explains why precautionary policies are not likely to emerge in a competitive economy or in the presence of a global pollution problem. 相似文献
832.
We determine how better information affects the average equity premium in a standard representative‐agent exchange economy. Perfect information obviously eliminates the equity premium, and a particular kind of information about the level of future consumption always lowers the average equity premium. Surprisingly, information sometimes raises the average equity premium, no matter what the preferences of the representative agent. Information purely about the volatility either of consumption or the marginal utility of consumption raises the equity premium for a wide class of preferences. Moreover, information can raise the average equity premium by an arbitrarily large percentage (while still matching important magnitudes, such as average growth and the risk‐free rate). We consider two different economies: a two‐period economy with arbitrary preferences for the representative agent; and an infinite horizon economy, in which we restrict both preferences and the endowment distribution. 相似文献
833.
Farinetto Christian 《统计学通讯:理论与方法》2013,42(14):2645-2658
We consider the problem of parameter estimation for an inhomogeneous Poisson process observed on the time interval [0, τ]. We introduce the minimum L 1-norm estimator of the unknown parameter and study the asymptotical behaviors of the estimates when the number of observations increases. It is established that this estimator is consistent and we show that the corresponding differences converge to certain variables. These limit variables are asymptotically normal as τ tends to infinity. 相似文献
834.
835.
Van Leeuwen JM Boyle S Salomonsen-Sautel S Baker DN Garcia JT Hoffman A Hopfer CJ 《Child welfare》2006,85(2):151-170
This article reports on results of a one-day public health survey conducted in six states by homeless youth providers to measure and compare risk factors between lesbian, gay, and bisexual (LGB) homeless youth and non-LGB homeless youth. This article intends to inform the child welfare field on existing gaps in services and areas where more training and technical support is necessary in providing services to homeless LGB youth. The findings point to substantial differences within the homeless youth sample and demonstrate that in addition to the public health risks young people face merely by being homeless, the risks are exacerbated for those who self-identify as lesbian, gay, or bisexual. The article informs child welfare providers and policymakers about the substantial vulnerability of LGB youth beyond that of non-LGB homeless youth and the need to fund programming, training, technical assistance and further research to specifically respond to the complex needs of this population. 相似文献
836.
Age at coming out among gay/lesbian/bisexual (GLB) persons and sexual debut with same-gendered partners has typically been investigated in samples that do not reflect the racial and ethnic diversity of these communities. Addressing this limitation, data were collected from a diverse sample of men and women attending large-scale GLB community events in New York and Los Angeles in 2003 (N = 2,733). Compared to older cohorts, younger cohorts (18-24 year olds) of both men and women reported significantly earlier ages for sexual debut with same-gendered partners, and earlier ages for coming out to themselves and to others. Also, women began the process at later ages than men, as they reported coming out to themselves and sexual debut with a same-gender partner approximately two years later than men. There were no racial or ethnic differences in age out to self or others; however, persons of color were less likely to be out to their parents. Service providers, sexuality educators, and researchers should attend to the diversity in experience of coming out among GLB populations as they relate to the individuals gender, age, and racial and ethnic backgrounds. 相似文献
837.
We examine how competition in international markets affects a union's choice of wage regime, which can be either uniform or discriminatory. Firms are heterogeneous with regard to international competition. When unions choose their wage regimes sequentially, a discriminatory outcome becomes more likely when international competition increases. However, for intermediate levels a union may stick with a uniform wage regime even if the rival union adopts a discriminatory regime. When competition is sufficiently intense, both unions revert to the discriminatory regime. Paradoxically only in those latter instances all parties (consumers, workers, and firms) may be better off (each in aggregate) if all unions adopt a uniform wage regime. We conclude that union incentives to coordinate their wage regimes should then also become largest. 相似文献
838.
We analyse the impact of different immigration policies on human capital investment in a search‐theoretic model. This class of models features unemployment and underinvestment in human capital. The underinvestment in human capital can be solved by combining immigration policy with appropriate education subsidies. Extending the model with respect to different skill groups allows to analyse the observed bimodal skilled immigration of the USA. 相似文献
839.
The aim of this paper is to determine if there is a causal relationship between multivariate constructs for quality (i.e., customer satisfaction, employee satisfaction, and employee service quality) and organizational performance. The presence of such relationships, as well as the identification of key indicators within each quality construct for different types of firms, are explored in this empirical study on the perceptions of middle managers in Taiwan and the United States. The study found a significant causal relationship between the quality constructs and organizational performance. These relationships are different, however, for the four types of firms based on age and size. Also, within the same firm types, there are differences among countries. For example, for older firms, Taiwanese managers tend to perceive customer satisfaction as the most important quality construct in improving organizational performance, while U.S. managers tend to perceive employee satisfaction as the most important. For younger firms, U.S. managers perceive customer satisfaction as influencing organizational performance, while Taiwanese managers perceive both customer satisfaction and employee satisfaction as doing so. A further breakdown of the quality constructs identified the key indicators within each construct that separates “better performers'’from “lesser performers'’in both countries for the four types of firms. These indicators are dissimilar, thus suggesting that focus on quality constructs may lead to improvements in organizational performance by focusing on different indicators in different environments. These results have implications for the adoption and implementation of quality practices in different countries. 相似文献