总线技术引领汽车网络新潮流

勿庸置疑,汽车电子已体现出网络化的发展方向,车载网络成为汽车电子领域发展的最大热点。提高控制单元间控制可靠性和降低成本的网络总线技术应用成为驱动力所在,包括CAN、LIN、FlexRey 及IDB1394等在内的总线已经成为     

Tax Competition and Economic Integration

This article examines the role of tax competition and economic integration in a core–periphery setting, where agglomeration forces are present. I present a New Economic Geography model, which accounts for firm entry/exit and international mobility of skilled labor employed in the public R&D sectors. In contrast to other literature on tax competition, I focus on its impact on labor migration and net earnings of skilled and unskilled labor. Economic integration is modeled as trade liberalization, an easing of factor mobility restrictions and technology diffusion. I find that tax competition favors skilled labor when trade costs are reduced. In contrast, unskilled labor benefits when factor mobility restrictions are eased and technology diffusion is enhanced.     

Optimizing marketer costs and consumer benefits across “clicks” and “bricks”

The Internet has revolutionized the retailing landscape and how goods and services are sold and distributed to consumers. One avenue of significant growth in online selling comes from multichannel retailers who offer products in stores as well as over the Web. These hybrids may leverage their “brick” locations by allowing customers to pick up or return orders purchased online at retail stores. This option lets Web-based buyers avoid added shipping costs and long package carrier lead times, albeit at a cost to retailers. To examine the viability of this strategy, we develop a mathematical model that examines the cost and value of providing in-store pickup and return. The model is used to determine the best subset of brick-and-mortar stores to handle in-store pickup and return demand. One of the principal takeaways is that not all retail stores should be offering in-store pickups and/or returns. Our computational results show optimizing the set of pickup and return locations may reduce system cost over baseline marketing policies where these services are set up at all or none of a retailer’s stores. In addition, we show that retailers can significantly improve some consumer benefits at little extra cost.     

A delay estimation technique for single and double-track railroads

To route and schedule trains over a large complex network can be computationally intensive. One way to reduce complexity could be to “aggregate” suitable sections of a network. In this paper, we present a simulation-based technique to generate delay estimates over track segments as a function of traffic conditions, as well as network topology. We test our technique by comparing the delay estimates obtained for a network in Los Angeles with the delays obtained from the simulation model developed by Lu et al. [Lu, Q., Dessouky, M.M., Leachman, R.C., 2004. Modeling of train movements through complex networks. ACM Transactions on Modeling and Computer Simulation 14, 48–75], which has been shown to be representative of the real-world delay values. Railway dispatchers could route and schedule freight trains over large networks by using our technique to estimate delay across aggregated network sections.     

Thinning and harvesting in stochastic forest models

This paper analyzes a stochastic forest growth model in which the manager is able to first thin the forest to promote better growth before harvesting. Both Wicksell single thinning and harvesting cycle and Faustmann on-going rotation problems are considered. The Wicksell problem is analyzed by first restricting the class of decision times to (thinning, harvesting) pairs that bound the growth away from infinity and imbedding the problem in an infinite-dimensional linear program on a space of triplets of measures. These measures capture the thinning and harvesting decisions along with the behavior of the growth process prior to harvest. An auxiliary linear program then leads to a nonlinear optimization problem for which an optimal value and solution are determined. The values of all the problems are be related through a set of inequalities. The solution of the nonlinear problem determines (random) thinning and harvesting times for the single thinning and harvesting cycle which demonstrate the equality of the values of these various problems. Finally for the Wicksell problem, the unrestricted class of thinning and harvest times is shown to give the same value as the restricted class. The Faustmann on-going thinning and harvesting rotation problem is reduced to a Wicksell problem which then allows for the characterization of the value as the solution to a different nonlinear optimization problem. The effects of the opportunity to thin the forest are illustrated on a mean-reverting stochastic model.     

Convergence or divergence: human resource practices and policies for competitive advantage worldwide

A the overall level of union membership has fallen in a number of advanced industrialized economies from the 1980s, researchers have become increasingly interested in the potential role of management actions in bringing about such reductions in union organization. Management opposition to union organization may take a number of different forms, with union de–recognition being the individual manifestation most frequently discussed and examined in Britain at the present time. The present paper, however, examines another possible manifestation of management opposition to union organization, namely the practice of multi–establishment organizations operating individual establishments on both a union and a non–union basis. This examination involves the analysis of two sets of survey data which contain evidence on the related phenomena of recognition by extension arrangements and non–uniform recognition arrangements. The basic picture which emerges is that recognition by extension arrangements has historically been of some considerable importance in Britain, although their future strength and influence may well decline as the extent of non–uniform recognition arrangements is now quite considerable and quite likely to increase over time.     

An examination of anonymous and non-anonymous fraud reporting channels

Interest in the role of the reporting channel on whistleblowing has been fostered by the passage of the Sarbanes-Oxley Act of 2002, which requires that audit committees of public companies establish and oversee an anonymous reporting channel for questionable accounting or auditing matters. But only limited information exists as to the likely effectiveness of such a channel as compared to a non-anonymous channel. The purpose of our paper is to report the results of an experimental study examining participants' intentions to report fraud using anonymous and non-anonymous reporting channels given information about the outcomes from a previous non-anonymous whistleblowing incident. The experiment manipulates the outcomes to both the previous whistleblower and to the transgressor. We find that while negative outcomes from the perspective of a previous non-anonymous whistleblower (either the occurrence of retaliation against that person or no negative repercussions to the previous transgressor) lowered participants' non-anonymous reporting intentions, these negative outcomes did not decrease participants' anonymous reporting intentions. But when, no such negative outcomes from the previous whistleblower's perspective have occurred, our participants' reporting intentions did not differ between the anonymous and non-anonymous channels.     

CROSS-PRODUCT SPILLOVERS IN THE SEMICONDUCTOR INDUSTRY: IMPLICATIONS FOR STRATEGIC TRADE POLICY

Although the manufacture of semiconductor products has been alleged to create substantial benefits to the economy resulting from the spillover of knowledge, this claim, with the exception of Irwin and Klenow (1994a), has not been subjected substantially to empirical analysis. Our article extends the analysis of Irwin and Klenow and develops and tests a model of knowledge spillovers across several semiconductor memory products. The results indicate that cross-product spillovers from Dynamic Random Access Memories (DRAMs) the integrated circuit product often designated as a ''technology driver'' to other memory products were limited. We discuss the implications of these results for strategic trade policy.