A factor analysis approach to measure the biased effects of retail fruit juice advertising

This study presents a structural factor analysis approach to measure the impact of advertising on consumer demand. It is assumed that advertising affects the latent perception of consumers, which in turn influences their purchasing behavior. This study investigates the relationship between consumer purchases and retail store advertising (i.e., newspaper advertising, in-store display, and point-of-purchase display) of three fruit juices using an extended Rotterdam model. The results show that the demand for orange juice and grapefruit juice was affected by their own advertising, while the demand for apple juice was only affected by advertising of competitive juices.The authors are a Senior Econometrician, TRS Risk Management, American Express Company; and a Research Economist, Florida Department of Citrus, and Adjunct Professor, Food and Resource Economics Department, University of Florida, respectively.The authors thank B. Dixon, A. Reynolds, S. Shonkwiler, H. Theil, K. Young, editor, and other anonymous reviewers for comments and suggestions. The usual disclaimer applies. This study was partially supported by the McKethan-Matherly Eminent Scholar Chair at the University of Florida.     

Ranking agencies under moral hazard

Summary. We provide rankings across uncertain outputs generated by agents functioning within the Principal-Agent paradigm. For agents who are identical except for their productivity, a necessary (but not sufficient) condition for an agent to be preferred is that her output dominates that of lower agents in the sense of First Degree Stochastic Dominance (FDSD) at every level of effort. Sufficient conditions are based on Blackwells ranking of information systems and involves a characterization of FDSD using stochastic matrices. Our conditions for ranking outputs extends earlier results concerning the value of information within the agency framework. We also show how our techniques can be adapted to rank agents even if the first-order approach for determining optimal contracts fails to hold.Received: April 2, 1996; revised version: October 30, 1996This revised version was published online in February 2005 with corrections to the cover date.     

An overlooked explanation of the declining saving rate

With a socioeconomic model of the determinants of savings that takes into account variables reflecting the abrupt changes in the divorce rate that occurred during the 1970s and the 1980s in the U.S., the increase in women's participation in the labour force, and their greater investrnent in education, we explain part of the measured decline in the saving rate. The uncertainty generated by the increased likelihood of divorces encourages households and women, in particular, to substitute human capital to financial or physical capital for precautionary savings.The authors thank Anna J. Schwartz and Pierre Perron for helpful suggestions and Anne-Marie El Hakim for her dedicated assistance on this project. The comments of the editor and of an anonymous referee contributed to improve the final version of the paper. The project was financed, in part, by a grant of the Quebec FCAR Fund.     

Success breeds success. The dynamics of the innovation process

This paper presents a dynamic random effects probit model for the realization of private firms' product and process innovations. We estimate the model with panel data collected by the Ifo Institute in Munich. The data covers the period between 1979 and 1986 and includes 301 firms of the West German manufacturing sector. It turns out that firms' probabilities of innovation depend on market structure, demand and cost expectations, unobserved heterogeneity, and realized innovations in the previous year. The positive significant influence of past innovations indicates that there is strong state dependence in the innovation process. This result supports the success breeds success hypothesis suggesting a positive impact of innovative success to further innovations in the following years.We would like to thank the Ifo-Institute for providing us with the data of the Ifo-Konjunkturtest. Special thanks to Georg Licht and Horst Rottmann for preparing the data. Helpful comments were received from participants of seminars in Mannheim, Hannover, and Nürnberg, especially from Dietmar Harhoff. We are particularly indebted to an anonymous referee for valuable suggestions. Financial support of the DFG is gratefully acknowledged.     

The impact of regional and sectoral labor market conditions on wages and labor supply — An empirical analysis for married women using West-German Panel data

In this paper we examine the effects of regional and industry specific labor market indicators on wages and labor supply of married females. Based on the standard life cycle labor supply theory we derive a two equation censored panel model and estimate it using the Minimum Distance Method.For our empirical analysis we use four waves (1984–1987) of West German Panel data merged with regional indicators and industry specific demand side indicators. We obtain the result that, unlike industry specific indicators, regional demand side conditions have virtually no significant effect on market wages but that a direct effect of regional labor market conditions on labour supply remains. We conclude that regional labor market conditions can directly constrain the individual labor supply decision.     

如何在降低库存成本的同时取得满意客户服务质量

库存水平与顾客服务质量是两个效益悖反的指标,如何能以较合理的库存水平实现较高的顾客服务质量呢? 文中通过客户的 ABC 分析、产品的 ABC 分析以及产品-客户九象限图分析,探讨了解决这个问题的方法.     

ABC管理法在电力营销中的应用

ABC管理法广泛地应用于社会、经济等各个领域。由于市场形势的变化,我国电力企业面临多方面的竞争,电力营销的地位日益突出。本文探讨了ABC管理法在电力营销中的应用,采用市场贡献率和盈利贡献率指标将客户分为A、B、C三类,对不同类的客户采用不同的营销策略。     

The effects of differences in year‐round,full‐time labor market experience on gender wage levels in the United States

This paper utilizes longitudinal information on annual hours worked to construct a more robust measure of labor market experience for young workers in the USA. This enhanced experience measure is then used to assess recent gender wage differentials. Our experience measure yields a dramatic improvement in the ability of standard earnings regressions to explain the variation in wages across individuals, especially for young women. In addition, our results indicate that approximately one‐fourth of the gender difference in average wages is attributable to the higher work experience levels of men.     

The discrepancy distribution of stationary multiplier rules for rounding probabilities

The problem of rounding finitely many (continuous) probabilities to (discrete) proportions N _i/n is considered, for some fixed rounding accuracy n. It is well known that the rounded proportions need not sum to unity, and instead may leave a nonzero discrepancy D=(∑N _i) −n. We determine the distribution of D, assuming that the rounding function used is stationary and that the original probabilities follow a uniform distribution. Received: April 1999