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11.
K Roscoe Davis 《Omega》1974,2(4):515-522
A firm's success, within a rapidly growing and dynamic market, depends upon its ability to respond to market demand and to react to competitive forces. A key factor determining success is the pricing policy employed by the firm. Product pricing, however, is not simple; supply and demand, as well as the interaction and reaction of competitors, must be taken into consideration. By simulating a competitive market environment, however, a firm should be able to evaluate different pricing strategies prior to employing a strategy in practice. The goal of this research was to propose a simulation model to serve this purpose. Particularly, the objective was to demonstrate that if an industry can be characterized as one in which cost as well as price decline with cumulative volume, a pricing policy leading to market dominance exists. A simulation model is desirable for evaluating the proper pricing strategy for achieving such a market position.  相似文献   
12.
A central sociological problem is the extent to which genetics and the environment influence human behavior. Studies of twins are a core method in attempts to disentangle and to determine the comparative strength of genetic and environmental influences on psychosocial outcomes. A critical assumption of twin studies is that both monozygotic "identical" twins and dizygotic "fraternal" twins share common social environments. Therefore, any greater similarity of monozygotic than dizygotic twins is attributed to genetic influences. This paper tests the equal environment assumption by examining the extent to which greater concordance of adolescent monozygotic compared to dizygotic twins results from social, as well as genetic, influences. Bivariate comparisons indicate that monozygotic twins show greater similarity than dizygotic twins in socially-based characteristics including physical attractiveness, time spent in each other's company, the overlap in friendship networks, and friends' use of alcohol. Multivariate analyses indicate that measures of the social environment sometimes reduce or eliminate apparent genetic effects. In comparison with genetic indicators, social variables are usually stronger predictors of depression and alcohol use and abuse. These findings suggest that past twin studies could overstate the strength of genetic influences because some similarities in behavior among monozygotic compared to dizygotic twins stem from social influences.  相似文献   
13.
In this study, we build on previous work by developing and estimating a model of the relationships between causal attributions (e.g., controllability, responsibility), familiarity with mental illness, dangerousness, emotional responses (e.g., pity, anger, fear), and helping and rejecting responses. Using survey data containing responses to hypothetical vignettes, we examine these relationships in a sample of 518 community college students. Consistent with attribution theory, causal attributions affect beliefs about persons' responsibility for causing their condition, beliefs which in turn lead to affective reactions, resulting in rejecting responses such as avoidance, coercion, segregation, and withholding help. However, consistent with a danger appraisal hypothesis, the effects of perceptions of dangerousness on helping and rejecting responses are unmediated by responsibility beliefs. Much of the dangerousness effects operate by increasing fear, a particularly strong predictor of support for coercive treatment. The results from this study also suggest that familiarity with mental illness reduces discriminatory responses.  相似文献   
14.
The purpose of this study was to refine and elaborate models of personality and relationship-specific characteristics in the perpetration of stalking and psychological abuse. Three hundred and forty-two college students who had been in intimate relationships completed a series of questionnaires about their most recent breakup and their former relationship. Our hypotheses were supported, with harsh parental discipline, anxious attachment, and need for control of one's partner forming a common cluster in the prediction of stalking and psychological abuse. For psychological abuse, relationship dissatisfaction added to the predictive factors; whereas for stalking, the level of anger-jealousy over the breakup was the major added factor. Degree of anger-jealousy was influenced by being the recipient of a breakup and the level of passion.  相似文献   
15.
Old and thin     
Davis DS 《Second opinion (Park Ridge, Ill.)》1990,(15):26-32; discussion 34-9
Viewing an elderly patient's refusal of food from the perspective of the jain tradition of sallekhana (voluntary starvation) permits the author to reconcile her need to "do something" with her belief in the principle of patient autonomy.  相似文献   
16.
This paper reports results of a harmonised study of subjective social indicators carried out in eight member countries of the European Community, sponsored, on an experimental basis, by the Statistical Office of the European Communities (Luxembourg). Comparative data from nationwide representative samples from Germany, France, Italy, the Netherlands, Belgium, the United Kingdom, Ireland and Denmark are presented for three key dependent measures of perceived well-being: Self-Assessed Health, Satisfaction with Housing and Life Satisfaction. The cross-cultural generalisability of the influence of demographic variables on these three measures in examined, using 4-way analysis of variance. The analyses revealed a remarkable consistency across nations in terms of the effects of certain demographic variables on some of the dependent measures; however, some inconsistencies were also revealed. Substantial discrepancies in mean scores of the same sub-groups in different countries were also observed. While further research would be required to determine whether these differences were due to objective circumstances or to cultural differences in subjective perceptions or response patterns, some tentative interpretations of the differences were put forth.  相似文献   
17.
Little is known about effective eHealth recruitment methods. This paper presents recruitment challenges associated with enrolling African-American girls aged 8–10 years in an eHealth obesity prevention program, their effect on the recruitment plan, and potential implications for eHealth research.Although the initial recruitment strategy was literature-informed, it failed to enroll the desired number of girls within a reasonable time period. Therefore, the recruitment strategy was reformulated to incorporate principles of social marketing and traditional marketing techniques. The resulting plan included both targeted, highly specific strategies (e.g., selected churches), and more broad-based approaches (e.g., media exposure, mass mailings, radio advertisements).The revised plan enabled recruitment goals to be attained. Media appeared to be particularly effective at reaching the intended audience. Future research should identify the most effective recruitment strategies for reaching potential eHealth audiences.  相似文献   
18.
To examine the implications of fathers' occupational conditions (i.e., income, work hours, shift work, pressure, workplace racism, and underemployment) for family members' psychological adjustment, home interviews were conducted with fathers, mothers, and two adolescent offspring in each of 218 Mexican American families. Results underscored the importance of acculturation as a moderator. Fathers' income was negatively associated with depressive symptoms in highly acculturated families but not in less acculturated families. In contrast, fathers' reports of workplace racism were positively associated with depressive symptoms in less acculturated families but not in more acculturated family contexts. These findings were consistent across all 4 family members, suggesting that the "long arm" of the jobs held by Mexican American fathers extends to mothers and adolescent offspring.  相似文献   
19.
Stalking is relatively common yet little is known of the longer-term health effects of stalking. Using the National Violence Against Women survey, we estimated lifetime stalking victimization among women and men, ages 18 to 65, identified correlates of being stalked, and explored the association between being stalked and mental and physical health status. With a criterion of being stalked on more than one occasion and being at least "somewhat afraid," 14.2% of women and 4.3% of men were victims. Among those stalked, 41% of women and 28% of men were stalked by an intimate partner. Women were more than 13 times as likely to be "very afraid" of their stalker than men. Negative health consequences of being stalked were similar for men and women; those stalked were significantly more likely to report poor current health, depression, injury, and substance use. Implications for victims, service providers, and the criminal justice system were reviewed.  相似文献   
20.
Two studies of the correlates of self-reported courtship persistence, stalking-like behaviors following a relationship break-up, and psychological maltreatment of partners were conducted in samples of male (N = 46 and 93) and female (N = 123 and 110) college students. Approximately 40% (38.5% and 44.6%) engaged in at least one stalking behavior following a break-up. A total of 10.7% (study 1) and 7.6% (study 2) engaged in 6 or more stalking behaviors. Stalking was significantly related to psychological maltreatment of the partner (PMP) prior to the break-up. Being the recipient of the breakup was associated with feelings of anger, jealousy and obsessiveness and with higher levels of courtship persistence, and stalking. A replicated path model showed that anxious attachment and need for control were related to PMP and that need for control had a direct contribution to stalking. For anxious attachment, its connection to stalking was indirect, mediated by the degree of anger-jealousy over the break-up.  相似文献   
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