A continuity property for local price adjustment mechanisms

This paper makes a case that a (local) continuity property is a reasonable one for any local price adjustment mechanism. This property means that if the starting points (i.e., initial prices) of the adjustment process are ‘close' to one another, and if the characteristics of the economies are ‘close' to one another, then, given any price adjustment mechanism, agents should compute equilibria that are ‘close' to one another. Under preferences which satisfy a ‘surjectivity hypothesis', it is shown that the tâtonnement process satisfies this continuity property on a nice subset of the space of all economies. A characterization of these economies for which the tâtonnement process is locally stable is given. Chart logic is a useful way to think about the path dependent property of implied volatility and about the relationship between implied volatility and historical volatility.     

Wage and price adjustment in a multimarket disequilibrium model

The estimation of wage and price adjustment equations rests heavily on the use of tension variables that aim at capturing the disequilibria in the labour and goods markets. Disequilibrium models therefore provide a natural way of endogenizing these tension variables. This paper estimates jointly a two-market disequilibrium model and a wage and price adjustment block where price and wage growth react to excess effective demands. The estimation is carried out using the simulated pseudo-maximum-likelihood methods developed by Laroque and Salaniè (1989); the results look promising as regards the estimation of even more sophisticated models.     

Judgmental adjustment of forecasts: A comparison of methods

Attention has recently been given to combinations of subjective and objective forecasts to improve forecast accuracy. This research offers an extension on this theme by comparing two methods that can be used to adjust an objective forecast. Wolfe and Flores (1990) show that forecasts can be judgmentally adjusted by analysts using a structured approach based on Saaty's analytic hierarchy process (AHP). In this study, the centroid method is introduced as a vehicle for forecast adjustment and is compared to the AHP. While the AHP allows for finer tuning in reflecting decision maker judgement, the centroid method produces very similar results and is much simpler to use in the forecast adjustment process.     

Estimating house price appreciation: A comparison of methods

Several parametric and nonparametric methods have been advanced over the years for estimating house price appreciation. This paper compares five of these methods in terms of predictive accuracy, using data from Montgomery County, Pennsylvania. The methods are evaluated on the basis of the mean squared prediction error and the mean absolute prediction error. A statistic developed by Diebold and Mariano is used to determine whether differences in prediction errors are statistically significant. We use the same statistic to determine the effect of sample size on the accuracy of the predictions. In general, parametric methods of estimation produce more accurate estimates of house price appreciation than nonparametric methods. And when the mean absolute prediction error is used as the criterion of accuracy, the repeat sales method produces the most accurate estimate among the parametric methods we tested. Finally, of the five methods we tested, the accuracy of the repeat sales method is least diminished by a reduction in sample size.     

The geometry of global production and factor price equalisation

We consider a production economy where commodities are partitioned into K irreproducible factors and L   reproducible goods, and the production technologies have constant returns to scale. We examine the geometry of the global production set in the space of commodities, and we derive theorems of non-substitution type. We define the “factors values” of the different goods, we use them to characterize the efficient production plans, and we investigate in detail the relations between the prices of goods and the prices of factors. We show that the prices of factors uniquely determine the prices of goods, and that, generically, equalising the prices of 2K$2K$ goods equalises the prices of factors.     

The frequency of price adjustment: A study of the newsstand prices of magazines

Data on the newsstand prices of American magazines is used to investigate the determinants of the frequency of nominal price change. Magazine price changes, often coming after real prices have fallen by one quarter, provide strong evidence for monopolistic sticky price models. The data is examined by applying a fixed effects logit specification to the price change rule implied by a target-threshold model of a firm facing general price inflation, an uncertain future and costly nominal adjustment. The essay concludes that higher inflation leads to more frequent price adjustment and that the real cost of price changes varies with the size of a real price change.     

Monetary policy,global liquidity and commodity price dynamics

This paper examines the interactions between money, interest rates, goods and commodity prices at a global level. Aggregated data for major OECD countries are therefore analysed in a cointegrated VAR framework. Our empirical results for the period ranging from the 1970s to 2008 support the view that, when controlling for interest rate changes and thus different monetary policy stances, money (defined as a global liquidity aggregate) is still a key factor to determine the long-run homogeneity of commodity and goods prices movements.     

Factors influencing the adjustment of women on global assignments

This study tests a four-factor model proposed by Caligiuri and Cascio (in press) for predicting the cross-cultural adjustment of female expatriates. The four factors tested in this paper were family support, personality characteristics, organizational support and host nationals' attitudes towards female expatriates. Structured phone interviews with thirty-eight American female expatriates from US-based companies were conducted. The responses were content analysed and regression was conducted. The results suggest company and family support are significantly related to cross-cultural adjustment. Thus, suggestions are given for future research on female expatriates using the theoretical model of social support. Practical recommendations for how to maximize the likelihood of success for women on global assignments are also given.     

Firms' price and wage adjustment in Europe: Survey evidence on nominal stickiness

This paper presents new evidence on the patterns of price and wage adjustment in European firms and on the extent of nominal rigidities. It uses a unique dataset collected through a firm-level survey conducted in 17 European countries and covering various sectors. Several conclusions are drawn from this evidence. Firms adjust wages less frequently than prices, on average every 15 and 10 months, respectively. Price and, especially, wage adjustment exhibit a substantial degree of time-dependence. In particular, wage changes tend to cluster at a specific time of the year, mostly January in the majority of countries. The results of a multivariate analysis indicate that prices are more flexible when competitive pressures in product markets are strong and when labor costs account for a lower fraction of firms' total costs, whereas wages are more flexible when bargaining is decentralized and when the coverage of collective bargaining and the stringency of employment protection legislation are low. Price rigidities are higher in firms with a larger share of high-skilled/white-collar workers.     

某品牌汽车天窗装配及面差调整工艺探讨

文章探讨了某品牌汽车天窗生产线的装配和调整天窗面差工艺,寻求改善作业时间和消除作业过程中的浪费,提高工作效率、保证装配质量、满足顾客需求,以达到提升工厂效益的目的。     

The adjustment process of Spanish repatriates: a case study

Little empirical research has focused on the repatriation process of international employees despite the increasing number of expatriations that take place and the consequences of its failure. Based on a ten cases study, this research provides an in-depth analysis of the adjustment difficulties repatriates face when they come back from international assignments. Findings suggest that these adjustment problems could lead to turnover intentions. The study also shows that work adjustment difficulties can be caused by differences between the host and the domestic organizational culture and it can be moderated by some organizational practices. Implications and recommendations for human resources practitioners and researchers are discussed.     

中外城市竞争力研究进展评析

随着知识经济时代的到来和全球经济一体化的迅猛发展,城市在一个国家和地区发展中的重要性日益增强,城市间的竞争日趋激烈.城市竞争力成为国内外研究的热点问题.本文详细阐述了当今国内外城市竞争力模型的现状,并对国内城市竞争力模型研究现状进行了评析.     

A simulation study of estimation methods in the analytic hierarchy process

This paper uses a simulation analysis to investigate the statistical accuracy and rank preservation capability of the AHP estimation methods. The methods under study consist of: the eigenvalue, mean transformation, row geometric mean, column geometric mean, harmonic mean and simple row average. The methods are compared under three distributions for error term—gamma, lognormal and uniform—and under two types of input matrices of various sizes.     

Customer green orientation and process innovation alignment: A configuration approach in the global manufacturing industry

Research suggests that manufacturers increasingly innovate processes to meet customer's green requirements; however, little is known about the impact on performance and the contextual conditions, under which they are effective. Grounded on configuration approach, this study develops taxonomies of manufacturing firms based on the degree of customer's green orientation and process innovation. This study argues that performance differences between these clusters, highlight managerial implications for sustainable development. The empirical data used in this study were drawn from Global Manufacturing Research Group (GMRG) survey project (with data collected from 629 manufacturing firms from nine countries). Our results show that customer green innovation taxonomies influence differently on environmental measures, costs, and financial performance. The study proposes three clusters: Process active, Green minimalist, and Green proactive. The main differences between manufacturers are based on the level of investments in joint green improvement initiatives and customer direct investments in green activities. Firms that belong to the Process active cluster, who are first within the industry to deploy new processes and update the latest process development, gained significant improvement in financial measures such as market share and profits. Whereas Green minimalist cluster lagged behind, Green proactive manufacturers aligned in both capabilities to experience higher payoffs in sustainable performance measures and efficiency. The findings provide a step‐by‐step decision‐making process and offer guidance for supply chain managers who have to stretch their needs to align the innovation processes to enhance their sustainable performance.     

Weak convergence of tree methods,to price options on defaultable assets

Abstract We discuss a practical method to price and hedge European contingent claims on assets with price processes which follow a jump-diffusion. The method consists of a sequence of trinomial models for the asset price and option price processes which are shown to converge weakly to the corresponding continuous time jump-diffusion processes. The main difference with many existing methods is that our approach ensures that the intermediate discrete time approximations generate models which are themselves complete, just as in the Black-Scholes binomial approximations. This is only possible by dropping the assumption that the approximations of increments of the Wiener and Poisson processes on our trinomial tree are independent, but we show that the dependence between these processes disappears in the weak limit. The approximations thus define an easy and flexible method for pricing and hedging in jump-diffusion models using explicit trees for hedging and pricing. Mathematics Subject Classification (2000): 60B10, 60H35 Journal of Economic Literature Classification: G13     

A comparison of shift-share and the RAS adjustment

It is argued that the RAS procedure applied to regions and industries performs a function similar to that of the shift-share technique, and that RAS has the advantage of a justification based on concepts from information theory.     

一个股市价量关系的统计模型

本文通过对股价与成交量的关系分析,提出了一个描述价格的改变量(收益率)与成交量的改变量(量率)之间的非线性统计模型,并进一步分析了在此模型下单只股票及多只股票期望收益率和风险,以及投资组合的风险。