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1.
Daiki Maki 《Empirical Economics》2013,45(1):605-625
Testing for cointegration in the presence of nonlinear adjustments or structural breaks is important for examining the equilibrium relationship among economic variables. It is known that standard cointegration tests perform poorly when a cointegration relationship has nonlinear adjustments or structural breaks. However, it is not clear how some cointegration tests allowing for nonlinearity perform under other classes of nonlinear cointegration models. This paper investigates which cointegration tests help detect a cointegration relationship with nonlinear adjustments or structural breaks. Our Monte Carlo simulation results demonstrate that the cointegration test with threshold adjustment generally has better power performance under most cointegration relationships with nonlinearity. We also provide empirical applications to the money demand and term structure of the U.S. interest rates. The empirical results show that the test allowing for threshold adjustment provides strong evidence of the cointegration relationships of money demand and the term structure of interest rates. 相似文献
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The success of tourism firms relies heavily on their ability to adapt to the changing external environments. Environmental scanning, as the acquisition and use of information about external events and trends, has received greater attention in the tourism management literature. This study investigated the environmental scanning initiatives of travel agent companies in Singapore through a questionnaire survey. In total, 42 completed forms were returned from 319 invited firms. The findings discovered a positive relationship between the scanning frequency and the perceived strategic uncertainty of task environment. It was also found that human information sources were used most frequently for collecting environmental information due to their highest reliability, while electronic sources were under-utilized probably due to lack of computer-based information system and awareness toward the importance of online information. 相似文献
5.
PROMETHEE Group Decision Support System and the House of Quality 总被引:1,自引:0,他引:1
Majid Behzadian Seyyed-Mahdi Hosseini-Motlagh Joshua Ignatius Mark Goh Mohammad Mehdi Sepehri 《Group Decision and Negotiation》2013,22(2):189-205
Quality function deployment (QFD) is a multi-step method that monitors customer needs throughout a product development process. The House of Quality (HOQ) exercise undertaken in the first phase of QFD is considered as the most important, since customer needs must be accurately translated into a set of technical requirements for the final product. This paper provides a PROMETHEE group decision support system (GDSS) approach that integrates the design preferences of the QFD team. We highlight the selection and ranking of the technical requirements in the HOQ exercise, where a group of multidisciplinary decision makers (DMs) in a globally dispersed QFD team is required to input their individual preferences. Our approach advances the HOQ group decision making context in three important areas. First, it treats each criterion and DM as unique in terms of the preference function and threshold levels. Second, it seeks a multi-criteria approach for the HOQ process, where some DMs may play a more important role than others on a certain criterion. Third, sensitivity analysis through the Geometrical Analysis for Interactive Assistance (GAIA) plane provides valuable information about the conflicts, similarities, or independencies between the criterion and the DMs, respectively. A case on an automotive part illustrates the performance of the PROMOTHEE approach with GAIA. 相似文献
6.
Parham Fami Tafreshi Mohammad Hasan Aghdaie Majid Behzadian Mahdieh Ghani Abadi 《Group Decision and Negotiation》2016,25(5):1021-1048
The importance of advertising media evaluation as a multifaceted problem is well known by both academics and practitioners. Although previous studies tried to optimize media evaluation, there still are some gaps and problems to address, particularly in areas of flexibility of models/frameworks, decision making quality, tension management, and agility of the evaluation process. Most of previous studies are based on inflexible models/frameworks that have limitations on number of criteria/alternatives they can consider and type of data they can process. A great volume of the work used arbitrary decision making; arbitrary decision making regarding criteria and media importance may reduce effectiveness of advertising campaigns. Furthermore, the academic literature offers little guidance on group decision aggregation, and tension management during decision making is neglected. Media evaluation is a time taking process and any acceleration will reduce pre-campaign costs. The main aim of this paper is to illustrate how a group decision support system (GDSS) can assist media planners to overcome mentioned problems more systematically. For this purpose, we developed a GDSS that is an integration of three well-known multi-criteria decision making techniques. With a real world case study, we illustrate the performance of the proposed GDSS. Results of our quantitative assessments indicate that the GDSS is flexible, allows decision makers to express their opinions, reduces tension among decision makers, and saves time. 相似文献
7.
Social Planner’s Solution for the Caspian Sea Conflict 总被引:1,自引:0,他引:1
Kaveh Madani Majid Sheikhmohammady Soroush Mokhtari Mojtaba Moradi Petros Xanthopoulos 《Group Decision and Negotiation》2014,23(3):579-596
This paper evaluates the proposed alternatives for sharing the Caspian Sea from the social planner’s or systems-level perspective with respect to the stakeholders’ utilities from the oil and natural gas resources of the sea. Different multi-criteria decision-making methods, namely dominance, maximin, lexicography, simple additive weighting, and TOPSIS are applied to determine the social planner’s ranking of these alternatives. Results suggest the Condominium governance regime as the most promising division method. Bankruptcy rules and cooperative game theory methods can be considered as the other socially optimal resolutions to the conflict over sharing the Caspian Sea energy resources among its five littoral countries. Consideration of these methods in negotiations may help with resolving the existing deadlock, which has been in place for two decades. 相似文献
8.
Previous studies included money supply volatility as well as output volatility as measures of uncertainty in estimating the demand for money. However, a more comprehensive measure of uncertainty is now constructed for many countries and is known as policy uncertainty. When we included this new measure in the formulation of the demand for money in Korea and relied upon a nonlinear specification of the money demand which allows us to assess the asymmetric effects of changes in the policy uncertainty measure, we found asymmetric long-run effects of policy uncertainty on the demand for cash in Korea. Our conjecture is that increased uncertainty induces Koreans to hold less cash in favor of safer assets and decreased uncertainty has opposite effects, though at different rate. 相似文献
9.
The effect of the 1977 Canadian firearm legislation on robberies involving firearms is evaluated between 1974 and 1992 using a pooled cross-section, time series model. The results show that the 1977 legislation did not reduce robbery involving firearms, nor did it have a significant effect on the total robbery or armed robbery rates. The legislation may even have acted perversely in that it may have increased robberies with firearms. In general, these results are consistent with previous published findings but contrast with unpublished governmental studies. The implication that this legislation may have acted perversely is new and requires further investigation. 相似文献
10.
Zusammenfassung Die Auswirkungen der Arbeitslosenunterstützung auf die Erwerbslosenquote in den Vereinigten Staaten. —In diesem Aufsatz wird
an einem preistheoretischen Modell untersucht, wie die Verfügbarkeit von Arbeitslosenunterstützung die Freizeit-Lohn-Konstellation
für den ?Durchschnittsarbeiter? ver?ndert und geeignet ist, Arbeitslosigkeit zu verursachen. Anhand des Modells wird gezeigt,
wie marktm?\ige und institutionelle Sicherungen in den Versicherungsprogrammen —wie die Notwendigkeit, eine neue Arbeit zu
finden, das Bestehen einer Wartezeit vor dem Empfang der Versicherungsleistungen und die Anforderungen für das Erfüllen der
Anspruchsvoraussetzungen —den Anreiz zur Arbeitslosigkeit, der durch Versicherungszahlungen ausgel?st wird, vermindern.
Das theoretische Modell führt zu einer Spezifizierung von Sch?tzgleichungen. Es werden aggregierte Zeitreihen-Daten der Vereinigten
Staaten für 1951–1972 und ein Querschnitt von U.S.-Bundesstaaten für 1971 benutzt. Dabei ergibt sich, da\ die unabh?ngigen
Variablen, die als Determinanten induzierter und zyklischer Arbeitslosigkeit unter den Versicherten vermutet wurden, theoretisch
erwartete Vorzeichen und statistisch signifikante Koeffizienten haben.
Das wichtigste Ergebnis der empirischen Untersuchung ist, da\ —h?tte 1972 das Verh?ltnis von Unterstützungszahlungen und Lohnh?he,
der Anteil der versicherten Arbeitskr?fte und die Beachtung der Anspruchsvoraussetzungen den Verh?ltnissen im ?Vollbesch?ftigungsjahr?
1955 entsprochen —die Arbeitslosenquote in den Vereinigten Staaten ceteris paribus 5,0 vH statt 5,6 vH betragen h?tte, d.
h. sie w?re um etwa 11 vH niedriger gewesen. Ein ?hnliches Resultat wurde bei einer Querschnittsregression für die 48 U.S.-Bundesstaaten
erzielt.
Die Autoren folgern daraus, da\ diese Ergebnisse es noch dringlicher machen, die ?ffentliche Debatte über ein zweckm?\iges
Vollbesch?ftigungsziel für die Geld- und Fiskalpolitik der Vereinigten Staaten wiederaufzunehmen und Fragen hinsichtlich der
optimalen H?he der Unterstützungszahlungen und der Beachtung der Anspruchsvoraussetzungen zu stellen.
Résumé Les effets des bénéfices de ch?mage sur les taux de ch?mage des E.U. —Dans cet article nous développons un modèle de prix théorique qui montre comment la disponibilité des bénéfices d’assurance de ch?mage change la position d’opportunité de revenu vis-à-vis des loisirs avec laquelle on confronte un ouvrier ?moyen? et comment elle a une tendance à stimuler le ch?mage. Nous utilisons le modèle de montrer comment les sauvegardes de marché aussi bien que les sauvegardes institutionelles dans les programmes d’assurance par exemple la nécessité de trouver un nouveau travail, l’existence les périodes d’attente avant de recevoir les bénéfices aussi bien que les co?ts de se soumettre aux règles d’éligibilité reduisent les incitations de ch?mage créées par les paiements de bénéfice. Le modèle théorique nous conduit à la spécification des équations d’estimation. En utilisant les données agrégées des séries de temps d’E.U. de 1951–1972 et une section transversale des états d’ E.U. en 1971 nous trouvons des signes attendus théoriquement et des coefficients statistiquement signifiants des variables indépendantes desquelles nous avons supposé qu’elles sont les variables déterminantes du ch?mage stimulé et cyclique parmi les assurés. Le résultat le plus important de notre étude empirique est que si en 1972 les bénéfices d’assurance de ch?mage relatifs aux salaires, la couverture des ouvriers et le renforcement des règles d’éligibilité auraient été au niveau de 1955, une année de ?plein emploi?, puis le taux de ch?mage d’E.U. ceteris paribus aurait été plut?t 5,0 vis-à-vis le pourcentage actuel de 5,6 ou environ 11 pourcent plus bas. Nous avons obtenu un résultat similaire avec une régression de section transversale des 48 états d’E.U. voisins. Nous conclusons que ces résultats renforcent l’urgence de réouvrir le débat public concernant le but de plein emploi approprié pour les politiques monétaires et fiscales d’E.U. et laissent élever les questions sur les paiements optimum de bénéfice de ch?mage et sur le renforcement des règles d’éligibilité.
Resumen Los efectos de los beneficios por desempleo sobre las tasas de desempleo en los EEUU. —En este artículo desarrollamos un modelo de teoría de precios que muestra que la disponibilidad de beneficios de seguros de desempleo produce un cambio en la relación de oportunidad entre ocio e ingreso para un trabajador ?promedio? y tiende a inducir desempleo. Se usa el modelo para mostrar cómo el mercado y las garantias institucionales de los programas de seguros, tales como la necesidad de encontrar un nuevo trabajo, la existencia de períodos de espera antes de recibir beneficios y el costo de someterse a las reglas reducen los incentivos en favor de desempleo creados por el pago de beneficios. El modelo teórico lleva a la especificación de ecuaciones estimativas. Usando datos para series de tiempo agregadas de EEUU en el período 1951–1972 y una estimación de sección transversal de los estados norteamericanos en el a?o 1971, encontramos signos teóricamente esperados y coeficientes estadísticamente significativos para las variables independientes, las que hipotéticamente son las determinantes del desempleo inducido y cíclico entre los asegurados. El resultado más importante de nuestro estudio empírico es que si en el a?o 1972 los beneficios del seguro de desempleo en relación a los salarios, la cobertura de trabajadores y la imposition de reglas de aceptación hubieran permanecido en el nivel de 1955, un a?o de ?pleno empleo?, entonces la tasa de desempleo norteamericana, ceteris paribus, hubiera sido 5.0 p.c. en vez de 5.6 p.c., o alrededor de 11 p.c. más baja. Un resultado similar fue obtenido de una regresión de sección transversal de 48 estados norteamericanos contiguos. Concluimos que estos resultados agregan una urgencia adicional a la reapertura de un debate público sobre una meta apropiada de pleno empleo para las políticas monetaria y fiscal de los EEUU y levantan preguntas sobre pagos óptimos de beneficios por desempleo y la imposición de reglas de aceptación.相似文献