Dynamic Relationships in the Market for Ocean Grain Freighting Services

A vector autoregressive model containing ocean grain freight rates, grain shipments, idled tonnage, new carrier deliveries and fuel prices is used to evaluate dynamic linkages in the ocean grain transport market. Dynamic relationships are of particular importance in ocean freighting months because freighting services are often contracted several months before shipment. In addition, such markets may be slow to adjust to shocks because of significant short-run fixities in shipping services. Ocean grain freight rates are found to be responsive to fuel prices and new ship deliveries, but are not affected by demand shocks. Ship idling rates are found to be sensitive to fuel prices, grain shipments and freight rates. Significant adjustment lags are revealed.     

Asymptotic analysis for optimal investment and consumption with transaction costs

We consider an agent who invests in a stock and a money market and consumes in order to maximize the utility of consumption over an infinite planning horizon in the presence of a proportional transaction cost . The utility function is of the form U(c) = c^1-p/(1-p) for p > 0, . We provide a heuristic and a rigorous derivation of the asymptotic expansion of the value function in powers of , and we also obtain asymptotic results on the boundary of the no-trade region.Received: July 2003, Mathematics Subject Classification (1991): 90A09, 60H30, 60G44JEL Classification: G13Work supported by the National Science Foundation under grants DMS-0103814 and DMS-0139911.     

RISK,UTILITY AND STOCKING RATE*

A simple utility-based model of risky wool production is presented. Evaluation of the model indicates the effect on optimal stocking rate of changes in the degree of risk aversion, farm area, variable cost, fixed cost, wool cut, wool price, variance of wool price, climatic variability and tax rate. It is shown that the utility hypothesis implies a lower optimal stocking rate than does expected profit maximization and hence implies a discrepancy between private and public optimal resource use which it is suggested, might be mitigated by a progressive bounty on wool production.     

A Test of a Buying Rule for "Underpriced" Apartment Buildings

Apartment-building repeat-sales data are used to test a trading rule. Property values are estimated through regression; if the actual price is less than the estimated value, the property may be "undervalued." Returns are calculated for these "undervalued" properties and adjusted for risk using the Sharpe ratio. A test is done of whether these ratios are significantly different for different portfolios. The "undervalued" properties have higher appreciation returns, but once these are adjusted for risk, the differences in returns are not significant. The paper contributes to the real estate efficiency literature and suggests a workable method for comparing the performance of real estate portfolios on a risk-adjusted basis.     

The effects of information order and hypothesis-testing strategies on auditors' judgments

This research examined the effects of information order and hypothesis-testing strategies on audit judgements. Auditors started with high or low prior beliefs about an internal control system and then reviewed both positive and negative evidence. The results suggest that, unless specifically requested to do so, auditors do not generally seek confirming evidence. We also found that prior beliefs have an effect on the importance of information order: with high prior beliefs, subjects' judgements were unaffected by information order, while low prior beliefs were associated with a recency effect.     

运用PDCA循环促进团队学习:以台湾医药物流业务团队为例

以台湾某外商医药物流公司为例,介绍了如何运用PDCA循环,历经多次沟通、协调、冲突与妥协的运作,进而成功建立"业务-营销运作中心"的方法.期间团队领导者与成员为达成高绩效表现,持续进行各种业务流程的改善,并以全员学习导向为标竿,不仅构筑了行业进入壁垒,并且培育了企业的核心竞争力.