WSN最终将"落脚"何处?

还记得"智能尘埃"(smart dust)吗?它用来形容那些可分布在任一角落的小小的传感器,而凭借由此形成的无线网络,人们从自然界收集信息就像在星巴克里登录WiFi网络一样容易.     

War and socialism: why eastern Europe fell behind between 1950 and 1989†

This article reconsiders the relative growth performance of centrally planned economies in the broader context of postwar growth in Europe. It reports a new dataset of revised estimates for investment rates in eastern European countries between 1950 and 1989. Complemented with data on other growth determinants, this evidence is used to re‐evaluate the socialist growth record in a conditional convergence framework with a panel of 24 European countries. After controlling for relative backwardness, investment rates, and improvements in human capital, the findings show that centrally planned economies underperformed due to their relative inefficiency only after the postwar golden age. In the 1950s and 1960s, eastern Europe was falling behind mainly due to relatively low levels of investment and weak reconstruction dynamics. Both are explained, in part, by the lack of labour‐supply flexibility that, in turn, resulted from the comparatively much larger negative impact of the war on population growth in eastern Europe.     

Does timing of decisions in a mixed duopoly matter?

We determine the endogenous order of moves in a mixed price-setting duopoly. In contrast to the existing literature on mixed oligopolies we establish the payoff equivalence of the games with an exogenously given order of moves if the most plausible equilibrium is realized in the market. Hence, in this case it does not matter whether one becomes a leader or a follower. We also establish that replacing a private firm by a public firm in the standard Bertrand?CEdgeworth game with capacity constraints increases social welfare and that a pure-strategy equilibrium always exists.     

Global trade flows and economic policy uncertainty

ABSTRACT

This article investigates the impacts of economic policy uncertainty (EPU) on global trade flows in gauging international trade developments. We employ a global vector autoregressive (GVAR) trade model, augmented with value-added bilateral trade linkages, that allows for quantifying the effects of economy-specific uncertainty shocks on exports and imports of individual economies. We find substantial spatial propagation in the temporal dynamics of international transmission of shocks amidst the manifestations of cross-border global value chains (GVCs) with China’s accession into the WTO. We provide evidence for the significance of EPU of China and the United States, particularly the latter, in influencing global trade flows. Our results show that while the US impacts can largely be attributed to its indirect trade linkages with other economies, the impacts of China can be relegated more to its direct GVC linkages. The findings have implications on trade protectionist inclinations of the current-term US government and the ongoing efforts of China’s policymakers in steering macroeconomic rebalancing for sustainable growth.     

两巨人的媒体PC之争

在PC机将成为新兴的家庭娱乐网络的中心这一话题谈论了多年之后,英特尔和AMD今年开始认真对待这一市场,双双发布了数字媒体PC平台。英特尔的Viiv平台和AMD的Live平台有很多共同之处。二者都采用双核处理器、高端音频和视频芯片以及复杂的网络和存储技术,同时二者也都选择微软的Windows Media Cen- ter作为操作系统。     

Liquidity constraints and the hedging role of futures spreads

This paper examines the behavior of the competitive firm under price uncertainty in general and the hedging role of futures spreads in particular. The firm has access to a commodity futures market where unbiased nearby and distant futures contracts are transacted. A liquidity constraint is imposed on the firm such that the firm is forced to prematurely close its distant futures position whenever the net interim loss due to its nearby and distant futures positions exceeds a threshold level. This paper shows that the liquidity constrained firm optimally opts for a long nearby futures position and a short distant futures position should the firm be prudent, thereby rendering the optimality of using futures spreads for hedging purposes. This paper further shows that the firm's production decision is adversely affected by the presence of the liquidity constraint. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:909–921, 2004     

Anti-shopping tourism: a new concept in the field of consumption

In this article, based on qualitative research in Hungary, we propose a new phrase for the field of tourist consumption. Our notion ‘anti-shopping tourism’ refers to the resistant attitude towards consumption and spending money during shopping-related tours. The research discussed in the paper analyses participants’ motivations, attitudes and behaviour on one-day coach trips that include various programmes, for example, sightseeing, lunch, spa visits and even a range of gifts, for a very low price, in exchange for participation in a professional sales show during the trip. Our main goal is to explain and, from an economic and anthropological point of view, conceptualise this form of tourist attitude, and to show how this unique way of travel may be situated in a certain historical setting in Hungary, more than two decades after the collapse of the socialist regime. In order to understand how the participating individuals negotiated this unique form of travel that exists in a grey zone of the institutionalised travel industry, notions such as debt, sacrifice, resistance, gift, seduction and informal contract are discussed and connected to the phenomenon.     

Influences of Culture on Transfer Price Negotiation

Luft and Libby (1997) posit that American transfer price negotiators tend to settle on prices that result in smaller differences in profit between divisions than the external market price will dictate. They attribute the results to a fairness effect. While fairness is present in all cultures, what is considered “fair” differs between cultures (Bian & Keller, 1999; Bolton et al., 2009; Gao, 2009; Surowiecki, 2009). This study ascertains whether cultural affiliation of the negotiator impacts this fairness effect. American and Chinese subjects participated in within-culture and cross-cultural negotiations in an experiment modeled after Luft and Libby (1997). Our results confirm Luft and Libby's (1997) fairness effect when American participants negotiate with each other, but illustrate a contrary effect when Chinese participants negotiate with each other. The negotiator's cultural affiliation is found to determine profit distribution in cross-cultural negotiations. These findings are consistent with longstanding theories of cultural traits (Hofstede, 1980) that are relevant to transfer price negotiation activities. Our results imply that the fairness effect in transfer price negotiation may need to be refined to account for the impact of culture.     

Sectoral analysis of foreign direct investment and growth in the developed countries

Empirical studies on foreign direct investment (FDI) and growth in developed countries have yielded conflicting results using cross-country regressions. We use sectoral data for a group of six country members of the OECD. Our paper is the first to identify the sector-specific impact of FDI on growth in the developed countries. Our results show that FDI has positive, or no statistically discernible, effect on economic growth directly and through its interaction with labor. Moreover, we find the effects seem to be very different across countries and economic sectors.