面向大规模定制产品成本估算方法的比较研究

本文首先分析了大规模定制企业开发成本估算方法对获得客户定单的重要性,对适用于大规模定制环境下的成本估算方法进行分类,归纳成几种典型的成本估算方法,并对各个方法的特点进行对比分析,提出了大规模定制环境下成本估算发展趋势,最后针对客户定单的获取和成本估算方法开发提出了自己的看法。     

Estimating demand from eBay prices

This paper presents results for identification and estimation of the value distribution from eBay auction prices. The paper presents results for eBay type auctions with independent private values and unobserved participation. It is first shown that the distribution of values is identified from observing the distribution of prices and knowing the distribution of potential bidders. The main identification result presents conditions for which the distribution of values and the distribution of potential bidders are simultaneously identified. Not surprisingly, the intuition is similar to the standard results for identifying demand from observed equilibrium prices. The estimation method suggested by the identification results is used to estimate the value distribution for the “C5” Chevrolet Corvette sold on eBay. The results suggest that a simple OLS model on prices will over estimate the mean value of the item. The estimation results are then used to calculate the optimal reserve price for these cars. The estimated optimal reserves are compared to the actual reserves. Actual hidden reserves are set much higher than actual non-hidden reserves. The evidence suggests sellers set Buy-It-Nows and hidden reserves optimally to account for re-listing opportunities.     

部分石化项目专利费的分析和测算

介绍了专利费的特点和测算原则，并对引进的部分专利技术的专利费作了分析和预测。     

如何加强在设计阶段的工程造价管理

分析我国设计阶段工程造价管理的现状,并就如何合理地确定投资估算和设计概算提出一些见解。     

Estimation of the scale matrix of a multivariate t-model under entropy loss

This paper deals with the estimation of the scale matrix of a multivariatet-model with unknown location vector and scale matrix to improve upon the usual estimators based on the sample sum of product matrix. The well-known results of the estimation of the scale matrix of the multivariate normal model under the assumption of entropy loss function have been generalized to that of a multivariatet-model. The paper is based on the first author’s unpublished Ph.D. dissertation ‘Estimation of the Scale Matrix of a Multivariate T-model’, University of Western Ontario, Canada. Present address: School of Mathematics and Statistics, The University of Sydney, NSW 2006, Australia.     

An Average Derivative Estimation of Stochastic Frontiers

This paper utilizes the average derivative estimation of Stoker (1986) and the pesudo-likelihood estimation of Fan, Li, and Weersink (1996) to estimate a semiparametric stochastic frontier regression, y = g(x) + , where the function g(.)is unknown and is a composite error in a standard setting. The proposed semiparametric method of estimation is applied to data on farmers' credit unions in Taiwan. Empirical results show that the banking services of the farmers' credit unions is subject to economies of scale, but high degree of cost inefficiency in operation.