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排序方式: 共有94条查询结果,搜索用时 156 毫秒
1.
Jaehyun So Nassim Motamedidehkordi Yingjie Wu Fritz Busch Keechoo Choi 《International Journal of Sustainable Transportation》2018,12(4):286-298
This study proposes an integrated simulation approach, which consists of a microscopic traffic simulation model, a vehicle dynamics model, and an emission estimation model, in order to estimate emissions based on more reliable vehicle performance measures. The vehicle performance measures such as engine power and engine speed significantly relate to the amount of emissions, and road curvatures and inclinations are the core inputs affecting these vehicle performance measures. Therefore, providing reliable vehicle performance measures reflecting the road geometric attributes is critical for a reliable emission estimation. This study proposes to use the microscopic traffic simulation model for generating vehicle trajectories, which is advantageous in modeling various traffic situations, and the vehicle dynamics model for producing the vehicle performance measures based on the vehicle trajectories. Finally, the outputs from the vehicle dynamics model are fed into the emission estimation model to compute emission measures. This study conducted a case-study using two road sections, one is a hypothesized road section, including various curvatures and inclinations with regular variations, and the other is a Kesselberg road section, which is an actual geometry in Bayern, Germany. The emission measures are estimated in these case-study road sections using both an existing simulation approach and the proposed integrated simulation approach. The difference between these two emission estimation approaches is discussed in terms of the emission measures, including fuel consumption, nitrogen oxides, and particulate matters. 相似文献
2.
THE 2007–2008 U.S. RECESSION: WHAT DID THE REAL‐TIME GOOGLE TRENDS DATA TELL THE UNITED STATES? 下载免费PDF全文
Tao Chen Erin Pik Ki So Liang Wu Isabel Kit Ming Yan 《Contemporary economic policy》2015,33(2):395-403
In the extant literature of business cycle predictions, the signals for business cycle turning points are generally issued with a lag of at least 5 months. In this paper, we make use of a novel and timely indicator—the Google search volume data—to help to improve the timeliness of business cycle turning point identification. We identify multiple query terms to capture the real‐time public concern on the aggregate economy, the credit market, and the labor market condition. We incorporate the query indices in a Markov‐switching framework and successfully “nowcast” the peak date within a month that the turning occurred. (JEL E37, G17) 相似文献
3.
Byoungho Jin Sojin Jung So Won Jeong 《The International Entrepreneurship and Management Journal》2018,14(1):195-215
This study examines how three different dimensions of entrepreneurial orientation (proactiveness, innovativeness, and risk-taking) each determine internationalization strategies and enhance international performance among small and medium-sized enterprises (SMEs) through the mediating role of marketing capabilities. An integrative theoretical framework built on international entrepreneurship and a resource-based approach was tested in the context of Korean SMEs. Analyses of 401 survey data collected from Korean exporting SMEs revealed the differential effects of each entrepreneurial orientation and the mediating effect of marketing capability on internationalization strategies and performance. Proactiveness and risk taking appeared to function as significant antecedents of marketing capability. Marketing capability, in turn, significantly decreased internationalization scope and increased the financial performance of Korean SMEs, though it did not influence internationalization scale. This study further confirms that the mediating role of marketing capability in entrepreneurial orientation-performance relationships vary by entrepreneurial orientation dimensions. Taking the direct and indirect roles of the entrepreneurial orientation dimensions together, this study recommends the critical prioritization of risk-taking over proactiveness. It extends previous approaches to the triad of resource–capability–performance. Theoretical contributions and insightful managerial implications are also provided. 相似文献
4.
Garry Chick Chih-Kuei Yeh Chi-Ming Hsieh So Young Bae Svitlana Iarmolenko 《Leisure Sciences: An Interdisciplinary Journal》2016,38(5):402-423
The purpose of this study threefold: to determine whether a shared cultural model of the importance of a set of leisure activities to a good leisure life existed in urban Taiwan, the degree to which cultural consonance in leisure mediates the relationship between leisure constraints and leisure satisfaction, and the degree to which leisure satisfaction affects life satisfaction and self-rated health. Results indicate that a cultural model of the importance of leisure activities to a good leisure life existed among sample members. Second, higher levels of self-reported participation in leisure activities that are culturally agreed upon as more important for a good leisure life are more strongly associated with leisure satisfaction than are activities culturally agreed upon as less important. Finally, leisure satisfaction strongly predicts both life satisfaction and self-rated health. 相似文献
5.
Despite the importance of market segmentation, the growth of the travel and tourism industry in Taiwan, and the repeat travel phenomenon in tourism, relatively few studies have examined the behavior of repeat travelers in the East Asia region. The present study was designed to fill this gap. This exploratory study applied multistage segmentation in the context of repeat travel behavior to Taiwan. It examined the socio-demographic profile, trip characteristics and expenditures of Taiwan inbound repeat travelers. The results indicated that nationality, income, type of travel arrangements and information search behavior significantly affected repeat travel behavior. In terms of travel expenditures, males spent significantly more than females. Those travelers between 40 and 60 years old tended to spend the most when they visited Taiwan compared to other groups. Chinese travelers were most likely to have traveled to Taiwan more than once among all nationalities compared in this study. Those from Korea and Japan spent the most money among all nationality groups. This study provided several significant implications for the marketers of tourism in Taiwan. 相似文献
6.
David F. Larcker Eric C. So Charles C.Y. Wang 《Journal of Accounting and Economics》2013,55(2-3):225-250
Firms with central boards of directors earn superior risk-adjusted stock returns. A long (short) position in the most (least) central firms earns average annual returns of 4.68%. Firms with central boards also experience higher future return-on-assets growth and more positive analyst forecast errors. Return prediction, return-on-assets growth, and analyst errors are concentrated among high growth opportunity firms or firms confronting adverse circumstances, consistent with boardroom connections mattering most for firms standing to benefit most from information and resources exchanged through boardroom networks. Overall, our results suggest that director networks provide economic benefits that are not immediately reflected in stock prices. 相似文献
7.
The article presents the visitors’ motivations and behavior at the pilgrimage center in Krakow (Poland). Here, the relation between these elements, i.e. whether their motivations have a correlation with what buildings they visit, is emphasized for the first time. The most important motivations for visits were religious and tourist ones, often rated equally high by the same respondents. They visited religious, cultural and tourist buildings and facilities. The stay of visitors with religious motivations was not limited to religious practices, but was extended by tourist behavior. Similarly, visitors with tourist motivations visited religious buildings and participated in religious practices. However, they visit tourist and cultural facilities more often. Additionally, the three groups of respondents were categorized and, on the basis of importance of the religious and tourist motivations, three types were distinguished, i.e. pilgrims, religious tourists and tourists. Their characteristic has been expanded by the analysis of their behavior. Nowadays, visitors’ motivations and behavior at pilgrimage centers include those typical for pilgrims and tourists in the traditional meaning. In addition to their religious function, these sites offer cultural and tourist facilities. The article highlights the dedifferentiation approach to visitors’ motivations and behavior, and in respect of the spatial organization of pilgrimage centers. 相似文献
8.
Permission marketing is becoming an important tool in maintaining relationships with travelers via the Internet. Its growing importance can be seen in tourism marketing, specifically in the lodging industry. With an increase in industry use, the effectiveness of this technique needs assessment. This paper initiates this process by examining current methods used to collect contact information for the purpose of permission marketing. Three segments of the market are identified and compared based upon their willingness to supply contact information. Significant differences were found in socio-demographics, online habits, trip characteristics, and website design preferences. Implications for lodging marketers are presented and future research topics are discussed. 相似文献
9.
Soňa Lemrová Eva Reiterová Renáta Fatěnová Karel Lemr Thomas Li-Ping Tang 《Journal of Business Ethics》2014,125(2):329-348
In this study, we develop a theoretical model of monetary intelligence (MI), explore the extent to which individuals’ meaning of money is related to the pursuit of materialistic purposes, and test our model using the whole sample and across college major and gender. We select the 15-item love of money (LOM) construct—Factors Good, Evil (Affective), Budget (Behavioral), Achievement, and Power (Cognitive)—from the Money Ethic Scale and Factors Success and Centrality and two indicators—from the Materialism Scale. Based on our data collected from 330 university students in Czech Republic, we provide the following findings. First, our formative models are superior to our reflective models. Second, for the reflective model, money represents Power, Good, Achievement, and not Evil, in the context of materialism. Our formative model suggests that those who pursuit materialism cherish Achievement (vanity) but Budget their money poorly. Third, multi-group analyses illustrate that humanities students (62.4 % female) consider money as Evil and Budget their money poorly, while those in natural sciences (37.6 % female) do not. Further, men are obsessed with Achievement, whereas women do not Budget their money properly, suggesting reflective temptation for males and impulsive temptation for females. Our novel discoveries shed new lights on the relationships between LOM and materialism and offer practical implications to the field of consumer behavior and business ethics. 相似文献
10.
Most small and medium enterprises (SMEs) in Korea struggle in financing R&D. Thus, the Korea Core Industrial Technology Investment Association (KITIA) was established to implement a matching fund program (MFP) to help SMEs with this undertaking. Applicant firms to the MFP are reviewed first based on their technology levels and are required to attract financing from venture capitalists (VCs), before receiving funds from the MFP. This paper, based on KITIAs MFP applicant data from 2001 to 2004, evaluates the performance of the MFP in terms of the success rate of funded SMEs’ initial public offerings (IPOs) and bankruptcy rates in relation to those SMEs that could not attract matching funds. Propensity score matching was used to eliminate selection bias from the data in order to assess the actual treatment effect of the MFP. According to the result of logistic regression applied to the matched data, MFP apparently did not have significant effects on IPO success and bankruptcy. This implies that MFP needs to allow VCs more time to evaluate SMEs covering qualitative aspects as well. It is expected that this change of structure can provide better performance of MFP in terms of IPO success and bankruptcy of matched SMEs. 相似文献