需求不确定性条件下的成本研究

文章分析了需求不确定性带来的成本影响,并且比较两种不同供应链模式的优劣以及对于不确定性的柔性。     

On continuous utility functions derived from demand functions

In the theory of revealed preference and in the approach to integrability theory of Hurwicz and Uzawa certain conditions are proposed implying the existence of a utility function generating the given demand function. This article presents a hypothesis which, under supposition of some well-known axioms of those models, is necessary and sufficient for the existence of a continuous utility function. This hypothesis implies the existence of a utility function u with the property that all of the boundary points of the set $\text{{x|u(x)≧α}}$ for every $\text{α?}\text{R}$ are lower boundary points, being fundamental for the continuity of the utility function.     

Continuous mean demand functions derived from non-convex preferences

In this paper we show that for a large subset of utility functions in the space of all C¹ utility functions and for all prices the mean demand of those consumers whose taste is represented by a given utility function in that subset is uniquely determined. This implies that for a large set of economies mean demand is a continuous function. Our analysis uses derivatives of first and of higher order. The result is essentially a consequence of the multijet transversality theorem.     

Capital,labor, and derived demand for information: Evidence from China

In this paper, information capital is considered as a separate input of production along with noninformation capital and labor. The substitution possibility among information capital, noninformation capital and labor has been estimated by nonlinear iterative algorithm using Chinese data for 1995–2017. The empirical results from the study imply that estimates of Chinese input substitution degree and productivity are underestimated without including information capital as an input separate from noninformation capital. When information capital and labor are combined, the contribution ratio of labor force may increase. Information capital interacts with noninformation capital and labor to promote economic development and production efficiency.     

The industrial demand for energy

This paper uses a constant elasticity of substitution production function to examine the extent of factor substitutability in the production of industrial goods. Subsequently, the degree of interfuel substitution is estimated and it is demonstrated that all energy sources are substitutable. Finally, the stability of the demand for various energy sources is empirically tested for and it is concluded that over the period of investigation the demand has in fact remained unaltered.     

The elasticity of derived demand, factor substitution, and product demand: Corrections to Hicks' formula and Marshall's Four Rules

The concept of the elasticity of substitution between capital and labor, introduced by John Hicks and Joan Robinson over 75 years ago, has had important implications in labor economics and several areas of economic inquiry. In his The Theory of Wages (1932/1963), Hicks developed a formula that has proven very useful in relating the substitution elasticity to the derived demand for productive factors, the distribution of factor incomes, and Marshall's Four Rules. This short paper shows that the original and subsequent derivations of Hicks' celebrated formula contained a slip (that factor shares are independent of the substitution elasticity and therefore constant), presents a new derivation and a corrected formula, and demonstrates that, with the corrected formula, Marshall's First Rule based on the substitution elasticity is no longer generally valid.     

The demand for season of birth

We study the determinants of season of birth for married women aged 20–45 in the USA, using birth certificate and Census data. We also elicit the willingness to pay for season of birth through discrete‐choice experiments implemented on the Amazon Mechanical Turk platform. We document that the probability of a spring first birth is significantly related to mother's age, education, race, ethnicity, smoking status during pregnancy, receiving WIC (Women, Infants & Children) food benefits during pregnancy, prepregnancy obesity, and the mother working in “education, training, and library” occupations; whereas among unmarried women without a father acknowledged on their child's birth certificate, all our findings are muted. A summer first birth does not depend on socioeconomic characteristics, although it is the most common birth season in the USA. Among married women aged 20–45, we estimate the average marginal willingness to pay (WTP) for a spring birth to be 877 USD. This implies a willingness to trade‐off 560 grams of birth weight in the normal range to achieve a spring birth. Finally, we estimate that an increase of 1,000 USD in the predicted marginal WTP for a spring birth is associated with a 15 pp (percentage points) increase in the probability of obtaining an actual spring birth.     

The demand for and supply of assurance

Consumers want products and services that are safe and of good quality. Corresponding to such demand is the demand for assurance , before the fact, that the quality and safety will be as promised. his demand for assurance creates opportunities for entrepreneurs to profit by providing assurance - and they do so in a wide and largely unappreciated variety of ways. The essential dialectic of the free enterprise system does apply to assurance. Governments'quality and safety restrictions on the freedom of contract, known to be so costly, are, therefore, unredeemed and should be repealed.     

The demand for gasoline: a two stage approach

The demand for gasoline has typically been estimated using a reduced-form equation model. The simplicity of the approach is attractive, but has proven to be costly in terms of the insights lost as to the nature of the processes governing the interdependence between fuel efficiency and the overall demand for gasoline. On the other hand, disaggregating the overall demand for gasoline into all of its components produces an enormous amount of detail and many insights, but increases commensurately the complexity of the system and reduces its usefulness in forecasting.A two stage simple demand equation is used which first involves an estimation of the level of fuel efficiency of the fleet stock in terms of price induced technical change. In the second stage, the first equation is coupled with other typical demand variables to determine the overall demand for gasoline. The procedure provides an excellent forecasting equation of both the short-and long-term demand for gasoline.     

The demand for M3 in the euro area

In this paper, an empirically stable money demand model for M3 in the euro area is constructed. Starting with a multivariate system, three cointegrating relationships with economic content are found: (i) the spread between the long‐term and the short‐term nominal interest rates, (ii) the long‐term real interest rate, and (iii) a long‐run demand for broad money M3. There is evidence that the determinants of M3 money demand are weakly exogenous with respect to the long‐run parameters. Hence, following a general‐to‐specific modelling approach, a parsimonious conditional error‐correction model for M3 money demand is derived which can be interpreted economically. For the conditional model, long‐run and short‐run parameter stability is extensively tested and not rejected. Copyright © 2001 John Wiley & Sons, Ltd.     

电子商务行业凸显物流需求

作为一种新兴的商业模式,电子商务最早产生于二十世纪60年代,90年代得到长足发展.目前,电子商务在欧美国家已十分普及.在法、德等欧洲国家,电子商务所产生的营业额已占商务总额的1/4,而在美国,其所占比例则高达1/3以上.     

The demand for computer services: A disaggregate decision model

Pricing schedules for computer resources have traditionally been based on ‘cost-recovery’ principles. While economists have begun to address pricing based on marginal congestion costs, most models take demand to be exogenous and given. Discrete alternatives are inadequately treated, and aggregation of data precludes any assessment of the impact of transaction size on consumers' decisions. Using disaggregated data, this paper derives empirical results confirming that consumers are strongly influenced by transaction sizes. Simulation experiments demonstrate that price incentives designed to modify the use of computer resources are considerably more effective if the distribution of demand is weighted towards large transactions.     

The demand for housing in developing countries: The case of Korea

This paper presents the results of an analysis of urban housing demand for Korea taking into account the most recent findings of housing demand analysis concerning specification and aggregation biases. In order to obtain correctly specified demand functions, a procedure based on a model of the housing market originally proposed by Muth is used. Drawing on the detailed land information available in Korea, this procedure permits the calculation of an individual price per unit of housing services for each household. The results show conclusively that both the income and price elasticity of the demand for housing services in Korea are comparable to those found in the United States: the income elasticity is smaller than one and the price elasticity is negative and smaller than one in absolute value. Given the number of countries found within the per capita income range between Korea ($700) and the United States ($7800), the finding that these two countries have comparable demand elasticities is of major significance: in the absence of good national estimates, the order of magnitudes found here would be used for other country analyses.     

The dynamic Laurent flexible form and the demand for money

I derive the dynamic full Laurent model to estimate economic models that assume a dynamic process. The application in this paper is to use the dynamic full Laurent to estimate a system of dynamic asset demand equations. The main results are that the dynamic full Laurent rejects its static version and the estimated elasticities are variable over time. Results from a Monte Carlo analysis, using a dynamic data-generating process, show that the prediction errors from the dynamic full Laurent are much smaller than those from the static version. Thus when the data are generated by a dynamic process, inferences from the static full Laurent model can be severely biased. © 1997 John Wiley & Sons, Ltd.     

The demand for retailer-financed instalment credit: An econometric analysis

During the mid- to late 1980s the UK's Chancellor of the Exchequer has attempted to reduce the volume of consumer credit extended by increasing interest rates rather than by re-introducing terms controls. This paper presents estimates of demand functions for new credit extended by retailers which was financed by them and repaid by instalments. Following earlier papers, a stock-adjustment model is presented that is extended to allow for credit rationing. The results suggest that the demand for such new credit extended is related negatively to terms control and positively to personal disposable income and expectations. Demand was not found to be related to (a proxy for) the nominal interest rate charged by retailers (although it was found to be positively related to the real rate). The former finding is consistent with questionnaire evidence that consumers are unaware of the interest rate that they pay for credit. Elasticities of demand are presented.     

The industrial and commercial demand for electricity under time-of-use pricing

In this paper we have developed and estimated the demand for electricity by an industrial (commercial) firm subject to time-of-use (TOU) pricing of electric power. In the application we use a quadratic production function and directly incorporate into the production process the restrictions that some inputs cannot vary over the day. We show that the TOU structure implies a unique set of parameter restrictions across the demand functions for inputs.     

北京地区国际商务人才需求调查分析

本文从大商务角度出发,采用电话访谈、座谈会、问卷调查等方式,对北京地区534家企业的国际商务人才需求进行了调研。主要调查分析了这些企业对国际商务专业人才需求的情况及其对国际商务人才职业能力和职业素质的要求等,为相关院校有针对性地制订人才培养方案提供了依据。