基于机械倾斜方式的过顶跟踪算法

首先推导了卫星过顶时盲区的计算公式,然后给出了实施机械倾斜过顶跟踪时,基于TILT A''-E''型三轴座架的倾斜范围的选取方法和倾斜轴方向的确定途径。经实际工程验证,这种倾斜范围的选取方法和倾斜轴方向的确定途径是合理、可行的。     

以色列人工智能发展现状分析及政策举措

目前,世界上许多国家都在竞相发展人工智能,以创新创业见长的以色列在人工智能方面也作出了重要部署,并有突出的表现。本文基于以色列创新署发布的《2019年创新报告》等报告及数据,着重分析了以色列近年来在人工智能方面取得的成就和当前发展所面临的障碍,以及以色列为保持现有优势并进一步推动人工智能发展的政策举措,旨在为我国人工智能的发展提供参考借鉴。     

Strategic Interactions and Contagion Effects under Monetary Unions

This paper applies game theory and a cost‐benefit analysis to study voluntary exits and contagion effects in countries joined to a monetary union. The paper looks at two non‐core or periphery countries of a large union and examines the role of structural asymmetries and strategic interactions as determinants of equilibrium outcomes, following both country‐specific and common shocks. The paper finds that under almost symmetry between countries, country‐specific shocks are never associated with multiple equilibria and, if large enough, can spread to other countries leading to contagion. By contrast, common shocks are seen to sustain multiple equilibria if almost‐symmetric countries are considered and to have implications similar to those found in the country‐specific case if large structural asymmetries are admitted.     

Towards a Strategic Model of Global Franchise Expansion

This paper develops the first global index of international franchise expansion that ranks countries according to their attractiveness to US-based franchise firms. A quantitative model combining insights from academic research and business practice generates a ranking of 143 potential expansion target countries according to their risk/opportunity profiles. The rankings suggest that countries with large markets and strong political and legal systems (large European countries, and Canada, Japan, and Australia) are the most attractive for US-based franchisors, while the small, unstable African countries are the least attractive. China (and the other BRIC countries—Brazil, Russia, India) though attractive from a market opportunity perspective, is nevertheless not highly ranked due to their significant risks and large cultural and geographic distances. This study reaffirms the importance of a strategic approach to international franchising decisions, underscores the importance of properly assessing the relative importance of key determinants in internationalization decisions, highlights the importance of a comprehensive and systematic assessment of the various risks in international franchising decisions, shows the usefulness of quantitative modeling in international franchising, and advocates the development of effective risk management methods in order to cope with rapid changes in the global marketplace.     

Trade and the location of industries: Some new results

We study a two-country two-sector model with free entry and monopolistic competition where both industries use labour to produce differentiated goods. The two countries are identical except for size. Labour is freely mobile across industries but it cannot move internationally. Transport costs affect both industries. The location of industries and the pattern of trade are the results of the interaction of two effects: the home market effect and the wage differential effect. The main results are: (i) if the two countries are sufficiently close in size and demand elasticities differ across industries (transport costs being equal), a continuous fall in transport costs from a prohibitive level to zero is associated with a reversal in the pattern of trade at some intermediate level. For large transport costs, the large country is a net exporter of the more differentiated good. For lower transport costs, the large country becomes a net exporter of the less differentiated good; (ii) if the two countries are very different in size and demand elasticities differ across industries (transport costs being equal), the larger country is always a net exporter of the less differentiated good.     

Financial Development and the Social Cost of Financial Intermediation in Africa

This article investigates the effect of financial development on the social costs of financial intermediation across a large number of banks in Africa. The study distinguishes between countries that are financially developed and those that are not financially developed to examine the impact of financial development on the social costs of financial intermediation. A sample of 260 banks from 29 countries in Africa is used over an 8-year period from 2006 to 2013. We employ both Random Effect and GMM techniques to resolve the issues of unobserved heterogeneity and endogeneity. We observe that overall, financial development reduces the social costs of intermediation. We also determine that the social costs of intermediation are lower for countries that have more developed financial systems compared to those with less developed financial systems. Our study is useful because it suggests that if countries want to reduce their social costs of intermediation, they should develop their financial systems.     

A natural science approach to investigate cross-cultural managerial creativity

As the relative effectiveness of physical resources decreases toward parity with rivals due to their fungibility, the firm's marketplace position, established by managers with a particular set of inter-culturally attuned set of personal values, may be the key antecedent in creating competitive strength in the firm. The research question addressed is how creative are culturally diverse managers; are managers from certain countries more creative than adaptive?We tested hypotheses in a cross-cultural setting based on the survey responses of 1365 managers operating in eight countries located in four culturally diverse regions of the world.Our study shows that managers are both creative and adaptive but the mixture of creative and adaptive behaviour varies depending on region and country and even within countries. Furthermore, the results confirm that creativity among managers in some countries is similar but large differences also exist between countries.     

Exploring night-time grocery shopping behaviour

Recent legal and societal developments have provided an impetus for rethinking retail opening hours in many European countries. In many of these countries, large supermarket chains are now developing an interest in extending their opening hours to a 24-hour regime. This paper discusses the conceptual foundations for understanding night-time shopping behaviour both from a sociological and a consumer research perspective. It also presents exploratory evidence from a study combining participant observation with a survey of 146 night-time grocery shoppers in a large supermarket in the Republic of Ireland. The results indicate that with a proliferation of ‘unconventional’ lifestyles among modern consumers, night-time supermarkets offer a service that is highly appreciated by parts of the Irish population. The study also shows that despite the prevalence of functional motivators for night-time grocery shoppers, the hedonic and social aspects of this shopping behaviour should not be overlooked. The paper finishes by developing a research agenda for consumer behaviour in the new 24-hour society.     

Pitfalls in the use of foreign direct investment statistics

Foreign direct investment (FDI) statistics are widely used to study the impact of international capital movements and multinational enterprise (MNE) activities. FDI intensity is also an important indicator of globalisation and economic integration. Datasets spanning long time periods and with broad country coverage have been employed in numerous studies to analyse various aspects of the determinants and consequences of FDI. Focusing on a relatively homogeneous group of six Western European EU countries, the present study finds major inconsistencies in the construction and coverage of these data both through time and across countries, leading to large discrepancies. Asymmetries will be far greater for broader groups of more economically and institutionally diverse countries. This study recommends extreme caution in drawing conclusions based on FDI data.     

The role of small firms in Indonesia

During the last two decades small firms in developing countries have received more and more attention from researchers and policy makers. For this, several reasons have been brought forward. The decline in labour absorption in agriculture and the slow growth of employment opportunities in the other sectors of the economy, combined with the fact that the growth of the labour force has accelerated, have led to un- and under-employment problems in many of these countries.Small firms are generally viewed as a useful means of alleviating these problems, because medium and large firms only would not help to solve the problems. However, from this study it can be concluded that the medium and large firms in the manufacturing sector in Indonesia are doing better in employment and income than generally anticipated.The purpose of this study is to examine the relative pattern of change and development of small firms in the manufacturing sector in Indonesia in the last two decades and possible factors affecting their growth. Also the relative importance of small firms in terms of income generation will be assessed.The study will use national data collected from the Department of Industry and Central Bureau of Statistic in Indonesia. Further, the study will be based, for its theoretical analysis, on relevant literature on the subject and on some empirical studies in Indonesia as well as in other developing countries.     

The Influence of Culture on Portrayals of Women in Television Commercials: A Comparison Between the United States and Japan

The present study attempts to examine the influence of culture on portrayals of women in advertising by examining television commercials from the United States and Japan. The two countries are similar in many respects but the norms regarding appropriate roles for women are quite different in the two cultures. Content analysis of television commercials showed that advertisements are to a large extent a reflection of society.     

Assessing Export Competitiveness through the Lens of Value Added

Extensive changes in the organization of world trade over the last two decades have renewed concerns about countries’ ability to compete in export markets. The impact could be especially large in industries that participate in global value chains (GVCs). This study assesses the recent export performance of 56 countries in five industries associated with GVCs using an index of normalised revealed comparative advantage (RCA) that can be compared across industries and countries and new data on the domestic value added in exports from the OECD's Trade in Value‐added database. For a number of the GVC industries, countries identified as the most competitive based on gross exports are often found to be less competitive when evaluated in terms of domestic value added. Business services are an important exception; several countries appear more competitive on a value‐added basis than based on conventional measures of gross exports. Despite concerns about hollowing out, a number of major industrial countries remain highly competitive in one or more GVC industries, even from the perspective of domestic value added. A value‐added approach to RCA provides insights that are not apparent from an exclusive focus on gross exports.     

Trade Liberalization,Nature of Mergers and Employment

This paper investigates the roles of comparative advantage and market size in the international location of manufacturing production. Building on the conventional Helpman and Krugman (1985) general equilibrium framework, our analysis extends the present literature by incorporating both effects in the same model, while allowing trade costs to vary almost continuously from autarky to free trade. The main result of our exercise is that market size effects offset comparative advantage if countries have similar factor proportions. A large country with a slight comparative disadvantage in manufacturing production may thus be a net exporter of manufactures. A small country with the same comparative disadvantage would be a net importer of manufactures. When countries are very dissimilar in their relative factor endowments, land-abundant countries specialize in the production of food, irrespective of market size, if manufactures are a labour-intensive sector. Labour-rich countries of any size are manufacture cores. However, land-abundant countries with large markets can sustain a domestic manufacturing industry until trade costs are very low, and in some cases only specialize in agriculture at free trade.     

Do Trade Agreements Increase Food Trade?

In addition to multilateral trade agreements under the World Trade Organization (WTO), the world has seen a remarkable proliferation of regional trade agreements (RTAs) in the last two decades. This study investigates whether these multilateral and regional trade institutions increase food trade and bring the world into a freer flow of food. The gravity model of international trade is used for the empirical analysis. The model is developed in a large panel data setting and attempted to address some potential problems in the estimations including multilateral trade resistances, zero trade values and endogeneity. The results suggest that both the WTO and RTAs have delivered significant positive effects on trade among the participant countries, but not food. Only RTAs are found to have increased food trade among the participant countries. However, although on average the WTO is found to have negative implications on food trade, it facilitates the developing countries more than the developed countries.     

Putting industries into the Eaton–Kortum model

The article introduces the industry dimension into the Eaton-Kortum model of trade. Industries are linked with each other by domestic and international trade in intermediate goods. The model is parametrized using data for eight industries in 1989. It is used to perform several counterfactual simulations that are relevant to today's policy debates. First, the model is used to study the effects of the US–EU trade wars. It is found that trade wars have a greater negative effect on countries with large initial net export positions. It is also found that some trade war scenarios are more beneficial to the US while others to the EU. Second, the model is used to study the effects of trade barrier reductions between the high-income and middle-income countries. The results show that this trade liberalization tends to reinforce the pattern of trade according to technological comparative advantages. The results also show which industries should be targeted for barrier reductions depending on policy goals. The third set of simulations investigates spillovers from the technological growth in the US machinery industry. The results show how geography, technology, and industry links affect the propagation of this growth across countries and industries.     

Internationalization Strategies Underlying the Performance of Foreign Banks in Latin American Markets

In this article, we evaluate the internationalization strategies underlying the performance of foreign banks in Latin American countries. Based on a multiple case study, we investigated the organizational paths in the study countries, the market segments served and performance. Our results show that it is possible to consider both economic and behavioral perspectives in this kind of analysis in order to map the entry modes and features of large banks in the study countries. We observed that some banks may have similar strategies in local markets, with particular emphasis on local adaptation, while others seem to promote the development of previous corporate characteristics.     

ICT as facilitator of internationalisation in small- and medium-sized firms

Based on harmonised and uniquely linked firm-level datasets for a large group of European countries, this study investigates the role of different information and communication technology (ICT) capacities in the internationalisation of small- and medium-sized firms (defined as having 10–249 employees). Both the decision to export and the export intensity are explored in this respect. The different ICT capacities are captured by online presence (having a website), online transactions (e-sales activities) and proportion of employees with broadband internet access or post-upper secondary ICT education. The results show a significant and positive relationship between the ICT capacities and the engagement in exporting activities of small- and medium-sized firms, although the kind of ICT capacity of importance seems to vary across countries. In countries where the ICT usage in firms is less developed, mainly basic capacities such as online presence are related to the decision to export. There are also indications that the export intensity is more strongly related to advanced ICT capacities than the pure decision to export.     

Managing customer relationships. The challenge of deploying scarce managerial resources

In industrial markets many managers from marketing, technical service and production functions interact with customers. How should these managers be allocated to an evolving array of customers? This paper reports on the customer visits made by the managers of one packaging supplier. The visits of the marketing people seem related to the financial significance of the customer, whereas the technical visits are best understood by a ‘portfolio’ approach. At the same time many idiosyncratic and situational factors affect resource deployments.     

Commodity windfalls,polarization, and net foreign assets: Panel data evidence on the voracity effect

This paper examines the effects that windfalls from international commodity price booms have on net foreign assets in a panel of 145 countries during the period 1970–2007. The main finding is that windfalls from international commodity price booms lead to a significant increase in net foreign assets, but only in countries that are ethnically homogeneous. In highly ethnically polarized countries, net foreign assets significantly decreased. To explain this asymmetry, the paper shows that in ethnically polarized countries commodity windfalls lead to large increases in government consumption expenditures and political corruption. The paper's findings are consistent with theoretical models of the current account that have a built-in voracity effect.     

Economic Freedom and Cross‐Border Acquisitions from Emerging Markets into Developed Economies

Extending the home base perspective by considering investors' parent countries, this study examines the effect of economic freedom (EF) on emerging‐market enterprises' (EMEs) overseas acquisition completion in developed countries. Using a large data set of 5,174 cross‐border acquisition deals from ten major emerging markets (EMs) during 1985–2011, we find that (1) the probability of deal completion is positively associated with the levels of EF of the acquirers' countries, the acquirers' parent and the target; (2) the EF of the countries of acquirers' parents has a substitutive effect on that of the acquirers' countries; (3) the difference of EF between the targets' countries and the countries of acquirers' parents negatively influences deal completion; and (4) the difference of EF between the targets' countries and the acquirers' countries negatively influences deal completion. These findings have important theoretical implications for international business scholars, as well as practical implications for managers and for policymakers of EMEs that are active in foreign direct investment. © 2016 Wiley Periodicals, Inc.