American Crystal Sugar Company: Making Ethanol from Sugar Beets?

The objective of the case is to have students analyze policy factors regarding the possibility of using sugar beets as an ethanol feedstock. Jim Horvath, CEO of American Crystal Sugar Company, is preparing a presentation for his cooperative's annual meeting. Students are asked to consider various economic factors that affect the supply and demand for ethanol and how sugar beet ethanol is produced.     

Challenging Local Authority Accounts—A Process in Need of Reform?

This article examines the challenges made by local electors to local authority and parish accounts in England and Wales, and the role of the District Auditor in this process. This matter has recently received some attention from the Nolan Committee. The different sorts of challenges that electors can make are explained and auditors' responses to challenges and the opportunities for abuse of the process by electors are examined. Finally, the authors look at the strength of the case for the reform of the system.     

How much does an Illegal Insider Trade?

This paper examines the choice of trade size by an illegal insider. Previous literature (i.e. Meulbroek 1992) tends to focus on the price impact of such a trader. Using a unique data set hand‐collected from the litigation reports of the Securities and Exchange Commission and court cases, we provide evidence, which suggests that the size of an illegal insider's trade is a function of the value of his private information, the probability of detection and the expected penalty if detected. Our results have important implication for security market regulators.     

Public insurance and private savings: who is affected and by how much?

This paper employs a recently developed instrumental quantile regression method to investigate the effect of Medicaid on household savings across different wealth groups. It finds that the disincentive effect of Medicaid on household savings is heavily concentrated in the middle net‐worth households. In contrast, the effects on the bottom and top net‐worth households are quite small and insignificant. These heterogeneous incentive effects are partly explained by Medicaid asset tests. Our findings hold regardless of whether affluence is measured in terms of wealth or income. They suggest that despite generating substantial crowd‐out for the mean household, Medicaid expansions are unlikely to discourage the savings of the poorest households. Copyright © 2008 John Wiley & Sons, Ltd.     

Hyperdeterminantal point processes

As well as arising naturally in the study of non-intersecting random paths, random spanning trees, and eigenvalues of random matrices, determinantal point processes (sometimes also called fermionic point processes) are relatively easy to simulate and provide a quite broad class of models that exhibit repulsion between points. The fundamental ingredient used to construct a determinantal point process is a kernel giving the pairwise interactions between points: the joint distribution of any number of points then has a simple expression in terms of determinants of certain matrices defined from this kernel. In this paper we initiate the study of an analogous class of point processes that are defined in terms of a kernel giving the interaction between 2M points for some integer M. The role of matrices is now played by 2M-dimensional “hypercubic” arrays, and the determinant is replaced by a suitable generalization of it to such arrays—Cayley’s first hyperdeterminant. We show that some of the desirable features of determinantal point processes continue to be exhibited by this generalization.     

The Limits of Transparency

This paper probes the limits of transparency in monetary policymaking along two dimensions: feasibility and desirability. It argues that, due to limited knowledge about the economy, even central banks (CBs) that are considered champions of openness are not very clear about their measurement of the output gap and about their beliefs regarding the effect of policy on inflationary expectations. Consequently, feasibility constraints on transparency are more serious than stylized models of the transmission mechanism would imply. In addition, no CB has made clear statements about its objective function, including in particular the relative weight on output versus inflation stabilization, the policy discount factor and the shape of losses from the inflation and the output gaps over the possible ranges of realizations of those variables.
The paper also argues that there is a trade-off between full transparency and full utilization of information in setting policy and that excessive transparency may facilitate the exertion of political pressures on the CB.
The last section of the paper abstracts from feasibility constraints and discusses the desirable levels of openness in various areas of the policymaking process. It is argued that the strongest case against immediate transparency arises when the CB has private information about problems within segments of the financial system. Premature release of information may, in such a case, destroy efficient risk-sharing arrangements and long-term investments by triggering a run on the financial system. This is illustrated within the context of the classic Diamond–Dybvig model of bank runs. The paper also probes the desirable levels of transparency in other areas of the policymaking process like the bank's objective function, the bank's output target, forecasts of economic shocks, disagreements within the CB board and the publication of CB interest-rate forecasts.     

Ancient Observations on Business Ethics: Middle East Meets West

Drawing on a small sample of writings from distinguished philosophers and poets living in the Middle East in the period from the eighth to the first century BCE, it is shown that a variety of business practices provided familiar examples of how people ought to act and live, morally speaking, to enjoy the best sort of life and to be the best sort of person. The writings reveal that we share a common heritage and humanity with people living 20 to 28 hundred years ago, and that some of the observations are as important and useful today as they were when they were originally made.     

香港也有“楼脆脆”

去年上海“楼脆脆”事件轰动内地，而今年1月29日晚上11时，位于香港九龙马头围的五层楼高的唐楼，在短短十几秒内整幢倒塌，为半世纪以来罕见。结构工程师估计，整幢唐楼倒塌时，最少造成5吨的沙砾共50吨的冲力。其导火线是工人在地下进行清拆僭建工程时，意外破坏唐楼的主力墙，导致整幢楼宇有如筋脉尽裂。     

The Lead–Lag Relationship Between Stock Indices and Stock Index Futures Contracts: Further Australian Evidence

This article examines the lead-lag relationship in returns on stock index futures and the underlying stock index for the Australian market between 1992 and 1997. On average across the sample period, futures returns lead index returns by twenty to twenty-five minutes and there is some evidence of feedback from the equities market to the futures market. Analysis conducted on a year-by-year basis suggests that the extent to which the futures market leads the equities market has decreased over time and the relationship between the two markets has generally strengthened. This is consistent with an increase in the level of integration between the markets. The results suggest that prior research that compares lead-lag relationships across international markets and time periods in drawing inferences on the effects of market structure needs to be interpreted with caution.