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排序方式: 共有148条查询结果,搜索用时 734 毫秒
81.
An empirical analysis is developed that quantifies the impact of different types of traffic incidents on the speed and maximum flow averages of vehicles on a controlled-access highway. The incident types considered include damage to highway infrastructure, vehicle rollover, crashes (into stationary objects), collisions (with moving vehicles), rain, fog, vehicle breakdowns, pedestrians on roadway, etc. Using real-world data from Chile’s most heavily used urban motorway/freeway, estimates of incident impacts on speed are generated using a multiple linear regression model incorporating instrumental variables to correct for endogeneity. Flow results are then generated using the fundamental traffic equation relating speed, flow and density. A ranking of the impacts on highway traffic of the different incident types based on incident frequency as well as impact size demonstrates that for the real case studied, the incidents with the greatest cumulative effect are (in order of magnitude) vehicle breakdown, collisions and rain.  相似文献   
82.
This paper estimates a dynamic factor model (DFM) for nowcasting Canadian gross domestic product. The model is estimated with a mix of soft and hard indicators, and it features a high share of international data. The model is then used to generate nowcasts, predictions of the recent past and current state of the economy. In a pseudo-real-time setting, we show that the DFM outperforms univariate benchmarks, as well as other commonly used nowcasting models, such as MIDAS and bridge regressions.  相似文献   
83.
This article analyzes how external crises spread across countries.The authors analyze the behavior of four alternative crisisindicators in a sample of 20 countries during three well-knowncrises: the 1982 debt crisis, the 1994 Mexican crisis, and the1997 Asian crisis. The objective is twofold: to revisit thetransmission channels of crises, and to analyze whether capitalcontrols, exchange rate flexibility, and debt maturity structureaffect the extent of contagion. The results indicate that thereis a strong neighborhood effect. Trade links and similarityin precrisis growth also explain (to a lesser extent) whichcountries suffer more contagion. Both debt composition and exchangerate flexibility to some extent limit contagion, whereas capitalcontrols do not appear to curb it.  相似文献   
84.
The aim of this paper is to evaluate the long‐term impact on Spanish individual income tax (IRPF) compliance of the amnesty measures granted in 1991 within the framework of the 1988–91 income tax reform programme. To that end, we combine time‐series techniques with outlier detection methods and the Bai and Perron (1998) test for the endogenous estimation of structural breaks. On the basis of the analysis of the monthly IRPF tax collection series from 1979 to 1998, we find that the amnesty had no effect on tax collection in either the short or the long term. By contrast, we find evidence of the permanent positive impact caused by the legislative and administrative measures linked to the IRPF reform process begun in 1988.  相似文献   
85.
Firms’ technological distinctive competencies (TDCs) help CEOs to confront their reality based on technological knowledge to achieve and exploit competitive advantage by encouraging the different dimensions of corporate entrepreneurship (innovation, new business venturing, proactiveness and self-renewal). The main purpose of this paper is thus to highlight how companies that strive to improve technological competencies within the firm achieve higher organizational performance through different components of corporate entrepreneurship and their interrelationships. This study seeks to fill this research gap by analyzing theoretically and empirically how TDCs enhance innovation, new business venturing and proactiveness and their interrelationships to achieve self-renewal and thus improve firms’ organizational performance. The methodology used is LISREL analysis. We test the model with data from 201 Spanish organizations. Our research contributes theoretical and empirical arguments on the value of TDCs to the organization, arguments that are especially important because organizations sometimes fail to achieve sustainable competitive advantage due to their limited understanding of the relationships between these strategic variables.  相似文献   
86.
New ventures are increasingly playing an important role in Latin American economies. However, little is known about the determinants of new firm growth in this context. The purpose of this study is to gain an understanding of the factors influencing new firm growth in Argentina, Brazil, Mexico and Peru. Individual, organizational and environmental factors are included in an empirical model, which is tested using data collected by face-to-face interviews with 582 entrepreneurs. Different specifications of employment growth and regression approaches are employed. Results suggest that growth strongly depends on the characteristics of the entrepreneur. National environment and firm-related factors are also important factors in determining growth.
Rodrigo RabetinoEmail:
  相似文献   
87.
The Dutch disease is a concern when a country is blessed with positive terms of trade (ToT) shocks. This article assesses the effects of a structural balance fiscal rule – which saves part of the revenues from better ToT – in limiting the real exchange rate (RER) appreciation. We find that the elasticity of the RER to ToT has declined (or is zero) in Chile and Norway, during the years in which the fiscal rule has been in place, although only for the part of ToT that accrue to government revenues.  相似文献   
88.
This paper examines employees’ reactions to Corporate Social Responsibility (CSR) programs at the attitudinal level. The results presented are drawn from an in-depth study of two Chilean construction firms that have well-established CSR programs. Grounded theory was applied to the data prior to the construction of the conceptual framework. The analysis shows that the implementation of CSR programs generates two types of attitudes in employees: attitudes toward the organization and attitudes toward society. These two broad types of attitudes can then be broken down into four different categories: (1) acceptance of the new role of the organization, (2) identification with the organization, (3) importance attached to the work performed and (4) a sense of social justice. In turn, each of these categories is a grouping of many different concepts, some of which have at first sight little to do with CSR. Finally, the analysis reveals an attitudinal employee typology: the committed worker, the indifferent worker, and the dissident worker.  相似文献   
89.
ABSTRACT

In this article we argue that the EU suffers from autoimmunity: a self-harming protection strategy. Drawing on Derrida’s political understanding of autoimmunity, we contend that the root of this malfunction lies in the EU’s own b/ordering and othering policies, which are intended to immunise the foundational ethos of the EU. For this purpose, we dissect the EU border regime into three linked b/ordering mechanisms: the pre-borders of paper documents that regulate from afar the mobility of the people from visa-obliged countries; the actual land borders often consisting of iron gates and fences regulating mobility on the spot; and the post-border in the form of waiting/detention camps that segregate and enclose the undocumented migrants after entry. We make clear how this discriminatory b/ordering and othering regime has led to a recurrent drawing of ever less porous, inhumane and deadlier borders. Such thanatopolitics finds itself at odds with the humanist values that the EU is supposed to uphold, particularly cross-border solidarity, openness, non-discrimination and human rights. We argue that the EU b/ordering regime has turned fear of the non-EUropean into an increasingly unquestioned – even ‘commonsensical’ – anxiety that has become politically profitable to exploit by extreme nationalistic and EUrosceptic parties. The core of the EU’s autoimmunity that we want to expose lies within this irony: in its attempt to protect what it considers meaningful, the EU has unleashed an autoimmune disorder that has turned the EU into its own most formidable threat.  相似文献   
90.
We present a new, publicly available database of real-time data and forecasts from the Bank of Canada's staff economic projections, which will be updated on an annual basis. We describe the data construct, its variables, coverage, and frequency. We then provide a forecast evaluation for gross domestic product (GDP) growth, consumer price index (CPI) inflation and the policy rate since 1982: We compare the staff's forecasts with those from commonly used time series models estimated with the real-time data, and with forecasts from other professional forecasters, and provide standard bias tests. Finally, we study changes in predictability of the Canadian economy following the announcement of the inflation-targeting regime in 1991. Our data set is unprecedented outside the USA, and our evidence is particularly interesting, as it covers over 30 years of staff forecasts, two severe recessions, and different monetary policy regimes.  相似文献   
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