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21.
Recent migration ‘crises’ raise important geopolitical questions. Who is ‘the migrant’ that contemporary politics are fixated on? How are answers to ‘who counts as a migrant’ changing? Who gets to do that counting, and under what circumstances? This forum responds to, as well as questions, the current saliency of migration by examining how categories of migration hold geopolitical significance—not only in how they are constructed and by whom, but also in how they are challenged and subverted. Furthermore, by examining how the very concepts of ‘migrant’ and ‘refugee’ are used in different contexts, and for a variety of purposes, it opens up critical questions about mobility, citizenship and the nation state. Collectively, these contributions aim to demonstrate how problematising migration and its categorisation can be a tool of enquiry into other phenomena and processes.  相似文献   
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The purpose of this research is to examine the influence of travel and tourism competitiveness (measured by the Travel & Tourism Competitiveness Index [TTCI]) on the national economic competitiveness of sub-Saharan Africa (SSA) countries (measured by the Global Competitiveness Index [GCI]). The aim is to identify critical factors for improving competitiveness of SAA countries from the area of tourism competitiveness. The study was conducted using the following methods: regression, cluster and grey relational analysis (GRA). Results reveal that travel and tourism competitiveness has a high impact on national competitiveness in the analysed group of countries. The study identified three homogeneous groups within SSA countries according to the TTCI pillars. The different impact of the TTCI on the GCI is determined in each of these three homogeneous groups of countries. The outcomes of this study could provide recommendations for tourism development policy-makers in SSA countries based on the results of GRA.  相似文献   
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Rousseau  Franck  Duda  Andrzej 《NETNOMICS》2000,2(3):279-291
We present an advanced multimedia infrastructure that integrates continuous real-time media streams within the WWW. This new service architecture focuses on advanced facilities for dealing with multimedia contents. A mediation server is at the heart of the infrastructure. It organizes and structures the multimedia information space. In addition to simple services for accessing and delivering multimedia data, it provides new functionalities for filtering and querying multimedia content. Content servers and on-line sources deliver media streams integrated within synchronized multimedia presentations. We think that the infrastructure will offer new opportunities for WWW-based information systems and electronic commerce. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   
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In a small, open economy with a convex production set, international capital mobility raises the cost of tariff protection on one subset of imports if there are irremovable quotas on another. Given irremovable quotas on one subset of imports, free trade is the optimal policy toward all other imports, with or without international capital mobility. Further, in the scalar case, international capital mobility reduces the optimal implicit excess tariff on the quota-constrained import if an irremovable tariff is in place on the other import.  相似文献   
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In this paper, we empirically examine how leverage affects firm performance when information asymmetries are large. We argue that entrepreneurs are strongly incentivized to maximize earnings when leverage is high in order to reduce the likelihood of adverse credit decisions and firm liquidation. Our empirical tests focus on the effects of leverage on firm profitability and growth in earnings during a 5‐year window after start‐up for a large and unique sample of newly established ventures in Belgium. Accounting for the endogeneity of leverage, the data reveal that more highly indebted business start‐ups are not only more profitable but also realize larger earnings growth. Moreover, the positive effect of leverage on firm profitability intensifies as the venture matures.  相似文献   
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We study an economy in which firms use labor and various vintages of capital in a CES production function for the final good. We explicitly solve for the investment in capital of a given vintage as a function of its age, and for the resulting stocks of capital. We show that for reasonable parameter values, inverted-U-shaped dynamics of investment and S-shaped dynamics for capital arise in equilibrium. We view the model as an explanation of intra-firm adoption lags, i.e., the observation that firms adopt innovations over time and not instantaneously.  相似文献   
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We survey European managers to gain some insights into motivations of convertible issuance. Our analysis shows that a majority of firms issue convertibles as ‘delayed equity’ and as ‘debt sweetener’. Managers also use convertibles to avoid short‐term equity dilution and to signal firm's future growth opportunities. We document a large cross‐sectional variation across firms in rationales for issuing convertibles and find mixed support for most theoretical models. Our evidence suggests that the popularity of convertibles is driven primarily by their versatility in adjusting their design to fit the financing needs of individual firms, and by their increased demand among institutional investors.  相似文献   
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