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151.
随着无线网络技术的不断发展,手机及其他无线设备的普及将成为一种趋势。由于的手机的携带方便,手机游戏又具有娱乐的功能,和J2ME技术的跨平台特性,使得越来越多的国内外厂商开始开发基于J2ME平台的无线应用服务。文章着眼于J2ME技术在手机游戏开发上的应用,在结合实际的开发经验与一些MIDP2.0新技术的基础上,讲述一款自主研发的基于MIDP2.0的坦克大战手机游戏设计。 相似文献
152.
153.
Abstract. Our paper investigates the link between international outsourcing and wages utilizing a large household panel and combining it with industry-level information on industries' outsourcing activities from input-output tables. This approach avoids problems such as aggregation bias, potential endogeneity bias, and poor skill definitions that commonly hamper industry-level studies. We find that outsourcing has had a marked impact on wages. Applying two alternative skill classifications, we find evidence that a 1 percentage point increase in outsourcing reduced the wage for workers in the lowest skill categories by up to 1.5%, while it increased wages for high-skilled workers by up to 2.6%. This result is robust to a number of different specifications. 相似文献
154.
Margarita Katsimi 《Scottish journal of political economy》2008,55(1):67-78
This paper considers the optimal level of firm‐specific training by taking into account the positive effect of training on the expected duration of workers' current employment. In the framework of an efficiency wage model, a short expected job tenure represents a disamenity that reduces the penalty from shirking. As this disamenity increases, workers have an incentive to continue providing a positive level of effort only if they are compensated by a higher wage. We endogenize the employment separation rate by introducing firm‐specific training. Firm‐specific training creates a rent that is lost if the worker is separated from the firm. As a result, the firm will be more reluctant to fire its trained workforce in a recession. This implies that firm‐specific training can decrease current wages because it represents a commitment to lower future labour turnover. 相似文献
155.
This paper presents empirical evidence on immigration flows into the OECD countries during the period 1990-2000. Our results indicate that network effects are strong, but vary between different groups of welfare states and between countries according to the type of immigration policy being applied. Network effects seem to be less important in the Nordic countries which also seem to attract immigrants from the lowest income level source countries. We do not find clear evidence that selection effects measured by migration flows being sensitive to differences in public social expenditures have had a major influence on the observed migration patterns until now. This may partly be explained by restrictive migration policies which may have dampened the potential selection effects. 相似文献
156.
157.
Relative income gap is one of the most popular approaches for explaining the income–happiness relationship. We argue in this article that when people compare their incomes, they care about distributional fairness more than relative income disparity. It is difficult for us to explain China's income–happiness paradox if we simply compare the income gap and do not explore the income‐generation process leading to income inequality. We therefore employ an approach based on a responsibility‐sensitive theory of justice that decomposes individual income into fair and unfair components. As a proxy for distributional unfairness, unfair income is considered the main source of unhappiness. Using data from the Chinese Household Income Project survey, we find strong support for the negative relationship between income unfairness and happiness. We also find a significantly positive relationship between the relative income gap and income unfairness, which leads us to consider the income comparison hypothesis as the explanation for the income–happiness paradox in a new light. Sensitivity analyses confirm the robustness of our results. 相似文献
158.
移动电子商务发展研究综述 总被引:2,自引:0,他引:2
移动商务是建立在先进的移动终端、完善的无线通信协议以及丰富的Internet信息上的一种新型商务交易方式,移动终端对Internet的介入使得用户随时随地获取所需信息,极大地增加了交易的灵活性,带来了更多的商机,促进了商务活动的发展。研究根据最新数据分析了国内外电子商务发展现状,总结了移动环境下的WAP和J2ME关键技术,并展望了未来电子商务的发展趋势。 相似文献
159.
This paper investigates the relationship between playing success and commercial success in team sports. Utilizing a data set relating to the English Premier League that combines both financial measures and indicators of playing skills and performances, our empirical analysis is based on three behavioural equations. Our analysis indicates that on‐field success can be directly related to players’ skills and abilities and that revenue is positively related to on‐field success. Wage expenditure is also shown to systematically reflect player skills and performances. One interpretation of this evidence is that investment in players’ skills and ability buys on‐field success, with richer teams becoming ever richer and able to maintain or even build upon success by spending more on players than less successful clubs. To the extent that richer clubs are successful in their objective there is a causal link between revenue earned and competitive imbalance via investments in players. The implications of this tendency within a league are discussed in our conclusion, which also considers the potentially wider implications of our study as they relate to the evolution of firm size and issues of market share. 相似文献
160.
Gregory Ponthiere 《Bulletin of economic research》2011,63(3):255-291
Whereas longevity‐adjusted consumption measures have become increasingly used as indicators of lifetime standards of living, it remained unnoticed that those measures, by relying on period – rather than cohort – life tables, constitute indicators of expected – rather than actual – lifetime standards of living. In order to estimate the actual gap between ex ante and ex post measures of lifetime welfare, this paper computes, for 19th‐century European economies, longevity‐adjusted consumption measures based on period and cohort life tables. It is shown that the gap between ex ante and ex post measures is statistically significant, and that attempts to reduce it are likely to be unsuccessful, because standards of living tend to exhibit, over temporal horizons as long as a human life, structural breaks, which make the ex ante measurement of lifetime welfare highly speculative. 相似文献