Design and development of inventory knowledge discovery system

Inventory management (IM) performance is affected by the forecasting accuracy of both demand and supply. In this paper, an inventory knowledge discovery system (IKDS) is designed and developed to forecast and acquire knowledge among variables for demand forecasting. In IKDS, the TREes PArroting Networks (TREPAN) algorithm is used to extract knowledge from trained networks in the form of decision trees which can be used to understand previously unknown relationships between the input variables so as to improve the forecasting performance for IM. The experimental results show that the forecasting accuracy using TREPAN is superior to traditional methods like moving average and autoregressive integrated moving average. In addition, the knowledge extracted from IKDS is represented in a comprehensible way and can be used to facilitate human decision-making.     

Conflict of interest and the credibility of underwriter analyst recommendations

Brokerage analysts frequently comment on and sometimes recommendcompanies that their firms have recently taken public. We showthat stocks that underwriter analysts recommend perform morepoorly than 'buy' recommendations by unaffiliated brokers priorto, at the time of, and subsequent to the recommendation date.We conclude that the recommendations by underwriter analystsshow significant evidence of bias. We show also that the marketdoes not recognize the full extent of this bias. The resultssuggest a potential conflict of interest inherent in the differentfunctions that investment bankers perform.     

Wage and hour violations in urban labour markets: a comparison of Los Angeles,New York and Chicago

This article compares violations of minimum wage laws and other labour standards in New York City, Los Angeles and Chicago. Los Angeles has the highest violation rates, due to such factors as its industrial composition and disproportionately large number of small establishments, as well as its vast unauthorised immigrant population. In addition, Los Angeles’ higher rates reflect the stricter legal standards in California. We conclude that, although stronger workplace laws and regulations are crucial, in the absence of effective enforcement, they may fail to prevent workplace violations.     

Justice for Janitors in Los Angeles: Lessons from Three Rounds of Negotiations

We examine an important recent organizing success of the US labour movement: the 'Justice for Janitors' campaign in Los Angeles. This campaign has spanned a complete business cycle and shows the union's capacity for growth over time. It illustrates the potential for unions to overcome pro–employer bias of labour laws, as well as their efficacy in appealing to the wider public. It exposes the importance of building coalitions, as well as the value of union analysis of legal, industrial, and political conditions. Our analysis suggests conditions under which unions might survive and thrive in the service sector in the twenty–first century.     

Back to the Future? US Labour in the New Gilded Age

This article argues that the twenty‐first century US labour movement has increasingly come to resemble its counterpart in the Gilded Age 100 years ago. Starting in the 1970s, deindustrialization and deregulation have gradually undermined the New Deal labour relations system, and have led to the proliferation of precarious labour. The labour movement then began to experiment with alternative labour organizing strategies and increasingly sought out political alliances with other progressive movements, reproducing practices that were widespread among US unions prior to the New Deal era. Although many of these experiments have succeeded on a small scale, they face intransigent opposition from employers and anti‐union organizations, and whether they can be expanded enough to generate a new labour movement upsurge remains to be seen.     

Do Sell-Side Stock Analysts Exhibit Escalation of Commitment?

This paper presents evidence that when an analyst makes an out-of-consensus forecast of a company's quarterly earnings that turns out to be incorrect, she escalates her commitment to maintaining an out-of-consensus view on the company. Relative to an analyst who was close to the consensus, the out-of-consensus analyst adjusts her forecasts for the current fiscal year's earnings less in the direction of the quarterly earnings surprise. On average, this type of updating behavior reduces forecasting accuracy, so it does not seem to reflect superior private information. Further empirical results suggest that analysts do not have financial incentives to stand by extreme stock calls in the face of contradictory evidence. Managerial and financial market implications are discussed.     

Do Recent PhD Economists Feel Prepared to Teach Economics?

A survey of recent economics PhDs who graduated from U.S. PhD programs and are now teaching in either the United States or Canada revealed that only half of the respondents who taught a stand-alone course during their doctoral program had any teacher preparation training. Those who did have training only felt “adequately” prepared for teaching. However, as a general rule, the respondents felt that they were well-prepared for teaching at the completion of their graduate program. The authors did not find significant differences in the responses of those who did complete formal pedagogical training during their doctoral program and those who did not. Those who completed training during their doctoral program appear to currently be more enthusiastic about training.     

I’ll have the ice cream soon and the vegetables later: A study of online grocery purchases and order lead time

How do decisions made for tomorrow or 2 days in the future differ from decisions made for several days in the future? We use data from an online grocer to address this question. In general, we find that as the delay between order completion and delivery increases, grocery customers spend less, order a higher percentage of “should” items (e.g., vegetables), and order a lower percentage of “want” items (e.g., ice cream), controlling for customer fixed effects. These field results replicate previous laboratory findings and are consistent with theories suggesting that people’s should selves exert more influence over their choices the further in the future outcomes will be experienced. However, orders placed for delivery tomorrow versus 2 days in the future do not show this want/should pattern, and we discuss a potential explanation.     

The Masters of Economics: Where are we Now?

In this article, the authors present results from a survey of Masters of Economics program directors to determine the missions, inputs, and outcomes of these degree programs throughout the United States and Canada. They compare results of this survey to those of two previous studies that they conducted 20 and 10 years ago. Respondents were asked to provide information on program admission requirements, curriculum, faculty characteristics, enrollment, graduation rates, student financial support, and placement. The authors describe the changes that have occurred in the most recent decade; determine whether the changes they observed between 1992 and 2002 have continued, been reinforced, or been reversed in the most recent 10 years; and determine whether any consistent long-term trends are evident over the 20 years of study.