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排序方式: 共有122条查询结果,搜索用时 15 毫秒
91.
Guido Consonni Monia Lupparelli 《Journal of statistical planning and inference》2009,139(12):4154-4164
The implementation of the Bayesian paradigm to model comparison can be problematic. In particular, prior distributions on the parameter space of each candidate model require special care. While it is well known that improper priors cannot be routinely used for Bayesian model comparison, we claim that also the use of proper conventional priors under each model should be regarded as suspicious, especially when comparing models having different dimensions. The basic idea is that priors should not be assigned separately under each model; rather they should be related across models, in order to acquire some degree of compatibility, and thus allow fairer and more robust comparisons. In this connection, the intrinsic prior as well as the expected posterior prior (EPP) methodology represent a useful tool. In this paper we develop a procedure based on EPP to perform Bayesian model comparison for discrete undirected decomposable graphical models, although our method could be adapted to deal also with directed acyclic graph models. We present two possible approaches. One based on imaginary data, and one which makes use of a limited number of actual data. The methodology is illustrated through the analysis of a 2×3×4 contingency table. 相似文献
92.
Though field-level uncertainty represents a common challenge, research seldom addresses how institutional work that aims to influence institutional change occurs in the face of uncertainty. We study institutional work practices in a field beset with high uncertainty. Focusing on a field-configuring event in the semiconductor industry, we show how institutional work is possible through practices of dealing with uncertainty that do not eliminate the basic uncertainty but nevertheless configure the field and institutionalize a common direction without specifying a final destination. We find evidence of the open-endedness and collectiveness of institutional work and we contribute to the microfoundations of institutional theory conceptualizing a set of four practices of dealing with field-level uncertainty purposively but not purposefully, i.e., bootstrapping, roadmapping, leader-picking, and issue-bracketing. We highlight the reciprocal relationship between practices and uncertainty, focus on the coordination of institutionalization, and distinguish between events in fields marked by high versus low uncertainty. 相似文献
93.
Guido Tabellini 《Journal of the European Economic Association》2010,8(4):677-716
Does culture have a causal effect on economic development? The data on European regions suggest that it does. Culture is measured by indicators of individual values and beliefs, such as trust and respect for others, and confidence in individual self determination. To isolate the exogenous variation in culture, we rely on two historical variables used as instruments: the literacy rate at the end of the 19th century, and the political institutions in place over the past several centuries. The political and social history of Europe provides a rich source of variation in these two variables at a regional level. The exogenous component of culture due to history is strongly correlated with current regional economic development, after controlling for contemporaneous education, urbanization rates around 1850, and national effects. (JEL: O10, F10, P10, N13) 相似文献
94.
In this paper we argue that government spending played a significant role in stimulating the wave of innovation that hit the U.S. economy in the late 1970s and in the 1980s, as well as the simultaneous increase in inequality and in education attainments. Since the late 1970s U.S. policymakers began targeting commercial innovations more directly and explicitly. We focus on the shift in the composition of public demand toward high‐tech goods, which, by increasing the market‐size of innovative firms, functions as a de facto innovation policy tool. We build a quality‐ladders non‐scale growth model with heterogeneous industries and endogenous supply of skills, and show that an increase in the technological content of public spending stimulates R&D, raises the wage of skilled workers, and, at the same time, stimulates human capital accumulation. A calibrated version of the model suggests that government policy explains between 12% and 15% of the observed increase in wage inequality in the period 1976–1991. (JEL: E62, J31, O33, O41) 相似文献
95.
Reciprocal Relations across Time between Basic Values and Value‐expressive Behaviors: A Longitudinal Study among Children
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Michele Vecchione Anna K. Döring Guido Alessandri Gilda Marsicano Anat Bardi 《Social Development》2016,25(3):528-547
The current study examines the reciprocal relations between children's values and value‐expressive behavior over a sixth‐month period. Three hundred and ten sixth‐grade students in Italy completed value and value‐expressive behavior questionnaires three times in three‐month intervals during the scholastic year. We assessed Schwartz's (1992) higher‐order values of conservation, openness to change, self‐enhancement, and self‐transcendence, as well as their respective expressive behaviors. Reciprocal relations over time between values and behaviors were examined using a cross‐lagged longitudinal design. Results showed that values and behaviors had reciprocal longitudinal effects on one another, after the stability of the variables was taken into account (i.e., values predicted change in behaviors, but also behaviors predicted change in values). Our findings also revealed that: (1) values were more stable over time than behaviors and (2) the longitudinal effect of values on behaviors tended to be stronger than the longitudinal effect of behaviors on values. Findings are discussed in light of the recent developmental literature on value change. 相似文献
96.
97.
Manufacturing internationalisation is a phenomenon that currently involves several industrial districts. While the literature on industrial districts is wide, few works analyse the (manufacturing) internationalisation dynamics. This study tries to fill this lack by analysing forms, motivation, obstacles and results of the foreign direct investments carried out in one of the most important Italian districts. The research shows how some of the district leading firms have recently combined local presence with a strategy of internationalisation that also involves manufacturing activities through foreign direct investments. The readers can comprehend the main features of the international manufacturing path that is involving one of the most important Italian industrial districts, i.e. the chair district. The research offers a contribution to an area rather neglected in literature – the district (manufacturing) internationalisation dynamics. 相似文献
98.
Chiara Consiglio Laura Borgogni Guido Alessandri Wilmar B. Schaufeli 《Work and stress》2013,27(1):22-42
In team-based organizations, team members may share similar experiences, feelings and, consequently, susceptibility to burnout. This study explores the burnout process beyond the individual level of analysis and integrates Social Cognitive Theory (SCT) with the Job Demands-Resources Model (JD-R), emphasizing the role of self-efficacy in shaping the meaning that people ascribe to situations. A multilevel structural equation model was tested in which it was predicted that work self-efficacy beliefs would be associated with burnout both directly and indirectly via job demands and job resources, and at both the individual and the team level. Moreover, it was posited that, at the team level, registered sickness absences are predicted by burnout. A sample of 5406 call centre operators, clustered in 186 teams working in the same large Italian company, filled out a questionnaire, whereas team absence rates were provided by the company's HR department. The findings largely supported the hypothesized model: at both levels, job demands and job resources partially mediated the relationship between self-efficacy and burnout. Moreover, at the team level, burnout predicted subsequent sickness absenteeism. In addition, individual-level burnout was primarily associated with job demands, whereas team-level burnout was primarily associated with a lack of team-level resources. 相似文献
99.
100.
People and Pixels 20 years later: the current data landscape and research trends blending population and environmental data 总被引:1,自引:0,他引:1
Kugler Tracy A. Grace Kathryn Wrathall David J. de Sherbinin Alex Van Riper David Aubrecht Christoph Comer Douglas Adamo Susana B. Cervone Guido Engstrom Ryan Hultquist Carolynne Gaughan Andrea E. Linard Catherine Moran Emilio Stevens Forrest Tatem Andrew J. Tellman Beth Van Den Hoek Jamon 《Population and environment》2019,41(2):209-234
Population and Environment - In 1998, the National Research Council published People and Pixels: Linking Remote Sensing and Social Science. The volume focused on emerging research linking changes... 相似文献