谁是铜价的推高者?

2008年初以来,在库存减少、美元走软以及资金推动下,国际铜价气势如虹强劲上扬,3月6日触及8820美元/吨,再创历史新高。在获利回吐的压力下迅速回调,轻探8000美元/吨位置后强劲反弹,再度逼近历史高点。在全球通胀的背景下,基本面的紧张加上资金的推动使铜价一路猛涨,处于历史高价区。是什么维持铜价仍然在高峰区间？铜下一步是再度挑战高点,还是在旺季支撑过后大幅下挫？     

Firm Experience and International Trade Fairs

This paper examines the behaviour of firms at international trade fairs (ITF). It advances the idea that prior ITF exhibiting experience shapes practice and performance. ITF usage is used as a proxy for experience and two groups identified—"heavy users" and "light users." Propositions are developed and tested on data collected from 303 Canadian companies. Key findings are that (1) fair selection practices appear to differ only marginally between heavy and light ITF users, whereas (2) exhibit planning and management practices, and (3) performance levels, differ sharply between heavy and light ITF users. Thus, experience impacts on ITF planning and management practices, and on performance levels, but less so on ITF selection.     

高油价背景下我国石油期货的发展

随着世界经济的复苏,世界各国对石油的需求旺盛,供给比较紧张等原因,使油价逐步攀升而且居高不下,并有继续攀升的势头。我国是石油消费大国和进口大国,已经开设了燃料油期货市场,但是市场品种单一,仍然面临被动地接受国际油价的局面。在这样的背景下,我国应该大力发展其他的石油期货品种,完善原油、燃料油和成品油价格形成机制,使我国逐步成为影响世界油价的重要因素,同时也为我国石油相关企业提供套期保值的场所。     

Short-sale refinancing and price adjustment speed to bad news: Evidence from a quasi-natural experiment in China

Short selling may accelerate stock price adjustment to negative news. However, the literature provides mixed evidence for this prediction. Using short-sale refinancing and a staggered difference-in-differences (DID) model, this paper explores the effect of short selling on stock price adjustment. Our results show that (1) short-sale refinancing improves the speed of stock price adjustment to negative news. This result holds after we control for endogeneity. (2) The positive relationship between short-sale refinancing and stock price adjustment speed is significant in subsamples of stocks with higher earnings management or lower accuracy of analyst forecasts, indicating that firms with more opaque information are more likely to be targeted by short sellers. In subsamples of stocks with a higher ownership concentration or lower ownership by institutional investors, short selling is more likely to increase the speed of stock price adjustment, indicating that ownership structure may influence negative news mining. (3) As short-sale refinancing exacerbates the absorption of bad news by stock prices, it increases crash risk. This study enriches the research on the economic consequences of short selling and provides empirical evidence supporting regulations on short selling in China.     

Can media exposure improve stock price efficiency in China and why?

The media in China has undergone extensive commercialization to become more market-driven over the last 35 years. Based on a sample of over two million newspape...     

Understanding the Characteristics of Price Elasticities for Frequently Purchased Packaged Goods

This study examines category and brand level factors of packaged goods to determine which ones are related to brand price elasticities. A new nonparametric method of elasticity calculation is presented that is suited to situations where detailed feature and display information is not available. To obtain results that lead to strong and reliable generalisations, we examine 26 categories and 110 brands using store level weekly scanner data. We also synthesise our results with four previous studies that have looked at determinants of price elasticities. Three factors consistently emerge as important drivers of elasticity. They are, competitive intensity in the category, whether or not the product is storable and the brand market share. A further, less certain, factor is the frequency of promotion activity, with categories and brands having more frequent promotions exhibiting lower sales increases when one or more of the brands price promotes.     

Globalisation versus differentiation as international marketing strategies∗

This paper examines the arguments in favour of following a global marketing strategy by comparison with the more usual differentiated approach. It is concluded that a global strategy is essentially unsophisticated and may be inappropriate as technology and the world economy mature.