Online/offline (hybrid) consumers and the attention economy

Yoram (Jerry) Wind, Vijay Mahajan, & Robert Gunther. 2002. Convergence Marketing: Strategies for Reaching the New Hybrid Consumer. Upper Saddle River, NJ: Prentice Hall. 368 pages. ISBN 0‐13065‐075‐7. Thomas H. Davenport & John C. Beck. 2001. The Attention Economy: Understanding the New Currency of Business. Boston, MA: Harvard Business School Press. 272 pages. ISBN 1‐57851‐871‐7.     

Store Brands: Who Buys Them and What Happens to Retail Prices When They Are Introduced?

Review of Industrial Organization - In this paper we study store brand demand behavior by examining a panel ofhousehold level and store-level data in five stores located in a competing marketarea....     

Is gold an efficient store of value?

Summary. Gold and tobacco have both been used as commodity money. One difference between the two is that gold yields utility, on account of its beauty, without diminishing its quantity. Tobacco yields utility when it is consumed. If this were the only difference, Received: January 2, 2001; revised version: February 22, 2002 Correspondence to: J. Geanakoplos     

基于邻近值的HEVC帧内预测优化

高性能视频编码(High Efficiency Video Coding,HEVC)标准中的帧内编码模式利用当前帧中像素点之间的空间相关性作出有效预测。为了解决待编码像素远离参考像素时预测不准确的问题,提出了一种基于邻近值的HEVC帧内预测优化算法。该算法的主要思想是,对于当前像素,先根据传统HEVC帧内编码方法得到其预测值,再使用该像素点左边、左上、上边位置的修正值以及该像素本身的预测值对该预测值进行修正。因为将当前像素与周围像素的相关性进行了有效的数学建模,所以HEVC帧内编码性能得到了提升。实验结果显示,所提算法与HEVC标准相比,最高节省了2.7%的码率,平均节省的码率为1.3%。     

Operating performance changes associated with corporate mergers and the role of corporate governance

We find that corporate governance characteristics of acquiring firms (board ownership, board size, and block-holder control) have an economically and statistically significant impact on operating performance changes following mergers. We also show that dispersion of intra-board ownership stakes is an important but heretofore overlooked factor when judging the influence of ownership on the outcomes of corporate choices. Finally, we present evidence that suggests the market sometimes under- or overreacts to merger news when initially revaluing merger partners but corrects any miscalculation following the consummation of the merger.     

Does it pay to venture abroad? Exporting behavior and the performance of firms in Indian industry

Using contemporary data for a firm-level sample of over 600 Indian firms, this paper investigates the impact that an export-orientation has on the profitability of the firms studied. The results, based on a two-stage least squares method, establish a positive and significant relationship between firms' levels of exports and profitability. For firms from developing and transition economies like India it does pay to venture abroad, and the ability to sell goods overseas has a significant impact on firms' economic performance. © 1998 John Wiley & Sons, Ltd.     

An empirical analysis of alternative parametric ARCH models

This paper presents empirical evidence on the effectiveness of eight different parametric ARCH models in describing daily stock returns. Twenty‐seven years of UK daily data on a broad‐based value weighted stock index are investigated for the period 1971–97. Several interesting results are documented. Overall, the results strongly demonstrate the utility of parametric ARCH models in describing time‐varying volatility in this market. The parameters proxying for asymmetry in models that recognize the asymmetric behaviour of volatility are highly significant in each and every case. However, the ‘performance’ of the various parameterizations is often fairly similar with the exception of the multiplicative GARCH model that performs qualitatively differently on several dimensions of performance. The outperformance of any model(s) is not consistent across different sub‐periods of the sample, suggesting that the optimal choice of a model is period‐specific. The outperformance is also not consistent as we change from in‐sample inferences to out‐of‐sample inferences within the same period. Copyright © 2000 John Wiley & Sons, Ltd.     

采用双网络结构的压缩视频超分辨率重建

在实际应用中,为了节省带宽和方便存储,图像和视频通常被下采样和压缩,而降质的图像与视频无法满足人们的实际需求。针对这一问题,采用了一种双网络结构的超分辨率重建方法,首先建立下采视频与压缩后的低分辨率视频的映射关系,然后建立质量增强的压缩视频与原始视频的映射关系,最终在输出端可以得到质量提升的视频帧。在网络中,采用密集残差块来提取压缩视频中丰富的局部分层特征,并结合全局残差学习恢复视频中的高频信息。在压缩环节,采用高性能视频编码来验证所提算法的有效性。实验结果表明,相比于主流的视频编码标准和先进的超分辨率重建算法,所提方法能有效提升编码视频的率失真性能。     

Comments on “Counterfactual Inference for Consumer Choice Across Many Product Categories”

Quantitative Marketing and Economics -     

Preventing shoplifting: Exploring online comments to propose a model

In recent years, the marketing literature has expended considerable effort to understand and theorize consumer misbehavior. However, scant research theoretically explores shoplifting. This is surprising, as currently, the annual cost of shoplifting is close to $50 billion in the United States. Utilizing a mixed-methods approach, we conduct two studies. Study 1 is a qualitative content analysis of online consumer discussions with regard to shoplifting. Study 2 is an empirical examination that uses a US national sample of n = 1,001 consumers; it is designed to test specific hypotheses regarding antecedents to consumers’ intentions to shoplift using an interdisciplinary theoretical framework from criminology, psychology, and marketing. The model integrates research from these different disciplines to improve our understanding of shoplifting by offering avenues to tackle it that supersede traditional security measures in retail. The integrated conceptual framework extends the theory of planned behavior and routine activity theory in understanding the behavioral intentions behind shoplifting. The results show that the suitability of shoplifting targets, offender motivation, and the absence of capable guardians affect potential offenders’ attitudes, subjective norms, and confidence in their ability to shoplift, which, in turn, all influence the intention to shoplift. The results contribute to our understanding of shoplifting and provide implications for retail practitioners over and above merely augmenting store security.