Income and Price Elasticities of Demand in South Africa: An Application of the Linear Expenditure System

This paper investigates the expenditure patterns of South African households using detailed cross‐sectional expenditure and price data that varies across region and time. Linear expenditure system parameter estimates are used to calculate income and price elasticities for a number of product categories at different points of the income distribution. We find substantial variation in the price and income elasticities of demand for items across the income distribution, with the bottom quartile being extremely sensitive to increases in the price of food and clothing items, and the top quartile being as sensitive as households in developed countries.     

Endogenous Price Leadership and the Strategic Acquisition of Information

We model a differentiated Bertrand duopoly in which a firm's earlier knowledge of market demand than its competitor results in endogenous price leadership with the information advantaged firm leading. In such a setting with second‐mover advantage, we then study the firms’ incentives to acquire information and analyze an information acquisition game. Both (i) neither firm acquiring information and (ii) one firm acquiring information can arise as subgame perfect equilibrium, but both firms acquiring information is never an equilibrium outcome, even if information is free. Information may have a negative value if it causes a change in the timing of price competition.     

Housing Supply,Demand and Price: Construction Cost,Rental Price and House Price Indices

Housing prices are subject to the impacts of supply as well as demand. While supply is affected by construction costs, demand is determined by the renting/buying considerations of the public. As a result, the construction cost index (CCI) on the supply side and the rental price index (RPI) on the demand side should be closely related to the house price index (HPI). The present study adopts three price indices of the Taiwan housing market, the CCI, the RPI and the HPI, and examines long‐term and short‐term correlations among the three indices. Empirical results indicate that the relationships among three indices are nonlinear. More interestingly, this article finds that the HPI stimulates changes in the CCI and the RPI, although construction costs and rent are viewed as fundamentals in the existing literature. This phenomenon is rather obvious when deviations of the latter two indices from the HPI are greater. The corrective behavior of the HPI is more notable under these circumstances.     

Information Effects in Uniform Price Multi‐Unit Dutch Auctions

We design a multi‐unit descending‐price (Dutch) auction mechanism that has applications for resource allocation and pricing problems. We address specific auction design choices by theoretically and experimentally determining optimal information disclosure along two dimensions. Bidders are either informed of the number of bidders in the auction, or know that it is one of two possible sizes; they also either know the number of units remaining for sale or are unaware of how many units have been taken by other bidders. We find that revealing group size decreases bids, and therefore revenue, if units remaining are not shown. When group size is unknown the price also falls if the number of units remaining is revealed. The most efficient and largest revenue outcome occurs when bidders are not provided information on either group size or units remaining. These laboratory results conform to some directional predictions from our theory, although overbidding is common.     

Price Dispersion and Accessibility: A Case Study of Fast Food

This study examines spatial variation in the price and accessibility of fast food across a major urban area. We use novel data on the price of a representative fast-food meal and the location of fast-food restaurants belonging to one of three major chains in the District of Columbia and its surrounding suburbs. These data are used to test a structural model of spatial competition. The results of this study are easily interpreted and compared with a past analysis. We find that spatial differences in costs and demand conditions drive variation in the number of firms operating in a market, which in turn affects prices.     

Reservation Values and Regret in Laboratory First‐Price Auctions: Context and Bidding Behavior

Recent articles hypothesize that an asymmetry in regret motivates aggressive bidding in laboratory first‐price auctions. Subjects emphasize potential earnings foregone from being outbid. Proposed motivators of this asymmetry include the one‐to‐one relationship in the auction between winning and positive earnings and the ex post knowledge that bidders who do not win the auction know they earned less than the winning bidder. We design a novel implementation of the first‐price auction environment in which these characteristics are not present, while leaving unchanged the expected‐earnings maximizing bidding strategy against any fixed beliefs about the bidding behavior of others. Bidding is significantly less aggressive in this treatment. These findings support the hypothesis that aggressive bidding is motivated in part by features of the protocol for incentivizing subjects that are not essential to the auction environment.     

Identifying Price Discrimination When Product Menus Are Endogenous

A well‐known approach to identifying second‐degree price discrimination is based on examining correlations between product menus and prices. When product menus are endogenous, however, tests for price discrimination may be biased by the fact that unobservables affecting costs or demand may jointly determine product menus and prices, leading one to falsely infer price discrimination. Using observed product characteristics or fixed effects to control for these unobservables confounds inference on the nature of price discrimination by potentially “overcorrecting” the original bias. I propose a difference‐indifferences approach that is robust to this critique. An application to the pricing of different package sizes of paper towels is presented.     

Price discrimination across different ticket distribution channels: Evidence from the US-china flight market

In the US-China international flight market, airlines sell tickets in two different distribution channels at vastly different prices. This provides a rare opportunity to examine how airlines practice price discrimination across different ticket distribution channels. Using a unique dataset collected from this market, we find that price discrimination across different ticket distribution channels is not influenced by market competition but increases with demand.     

New Evidence on Export Price Elasticity from China and Six OECD Countries

This paper provides new evidence on export price elasticities by analyzing the cases of China, France, Germany, Italy, Japan, UK and the USA over the period 1990–2012. Estimates have been made using panel data techniques for non‐stationary data. After demonstrating that long‐run relationships are stable to any structural break, it is found that exports are significantly determined by foreign demand, with long‐run income elasticity significantly higher than unity for China, Japan, Germany, the UK and the USA. Conversely, exports are price inelastic for most of the countries in the sample, in both the long run and the short run. The exception is France, whose export price elasticity is lower (higher) than unity in the short run (long run).     

Price shocks in regional markets: Japan's Great Kantō Earthquake of 1923

Japan's Great Kantō Earthquake of 1 September 1923 devastated the area around Tokyo and the country's main port of Yokohama. This article uses the earthquake as a case study to inform our understanding of the economics of disasters and the history of market integration. It seeks to test two main assumptions: first, that shifting demand and supply curves consequent on a disaster will have some impact on prices; and second, that any local changes in the disaster region are likely to be diffused across a wider geographical area. We make use of a unique monthly wholesale price dataset for a number of cities across Japan, and our analysis suggests three main findings: that price changes in the affected areas immediately following the disaster were in most cases reflected in price changes in Japan's provincial cities; that cities further away from the devastation witnessed smaller price changes than those nearer to the affected area; and that the observed pattern of price changes reflects the regional heterogeneity identified by scholars who have worked on market integration in Japan.     

The “Services” Explanation for Resale Price Maintenance: Deleterious Results Missed in the Economics Literature and in Legal Decisions

Policy discussions and a U.S. Supreme Court decision interpret retailer services induced by retail price maintenance (RPM) as enhancing consumer surplus (CS) and welfare enhancing, marginalizing dissenting opinions that use similar models but with different parameters. However, if presales services stimulate demand by providing information about a product's value, they need not raise postsale value in use. Inframarginal consumers' presales perceived value may increase, but their postsale value may be unchanged, so their supposed CS gains are ephemeral, and their actual surplus falls proportional to price increase. We show that, even adding in gains to marginal consumers, effects on CS are far more negative than conceived of in this literature. Consequently, in a rule‐of‐reason antitrust environment, if RPM is challenged without alleging collusion or exclusion, presales demand‐inducing information provision is a flimsy defense if CS is the standard and not always convincing if total surplus is the standard.     

Price Discrimination in the Subscription Market for Economics Journals

We examine what factors affect the degree of price discrimination for an academic journal by analyzing data on 190 of the 208 economics journals indexed in the 2008 edition of Journal Citation Reports. We find that (i) the library‐to‐individual price ratio of a for‐profit journal is 37% higher than that of a comparable nonprofit journal because the price premium of a for‐profit journal in the library market is disproportionately larger than that in the individual market, (ii) journals with higher citations per page or impact factor are more price discriminatory, and (iii) Elsevier and Wiley‐Blackwell practice the highest degree of price discrimination of all publishers.     

采购人在预算约束下高价采购需求与社会公众采购低价期望的博弈分析

在政府采购过程中，采购人作为采购需求方期望采购到质量高、尽可能满足其使用需求的商品，但由此会提高政府采购价格。我国实行政府集中采购的主要目的之一就是要降低采购价格，促进公共财政节支。因此，社会公众、政府监督管理部门会通过其监督作用约束政府采购价格尽可能低。本文运用博弈论方法分析采购人与社会公众监督管理部门在政府采购过程中两方的博弈均衡结果，并提出相应对策建议。     

我国城镇居民商品需求价格弹性的估计

通过将消费率变量引入到弗里希的需求价格弹性估计方法中,经过数理推导,获得了需求价格弹性估计的方程组。研究发现:就需求自价格弹性而言,商品需求受自身价格的影响程度最大,而受其他商品价格的影响程度较小。随着收入组等级提高,商品需求对其价格变化的反映更为敏感。就需求交叉价格弹性而言,食品价格对其他商品的影响程度最大。随着收入等级提高,食品价格对其他商品的影响程度不断下降。     

Price adjustment after hyperinflation in Zimbabwe

This paper examines—post‐dollarization in Zimbabwe—the extent of price dispersion within Zimbabwe and between Zimbabwe and South Africa. We document the adjustment process, and the mechanisms of price adjustment after the introduction of the new currency system in Zimbabwe. We show that prices converged post‐dollarization. We argue that the fall in price dispersion is not a product or a Southern Africa region effect. Rather it is a Zimbabwe specific effect and given that price convergence happens quicker the closer the month is to the dollarization, we argue that the observed results are driven by the change in currency. Price dispersion happens faster between major cities and secondary cities, suggesting improvements in information and trade signals between major and secondary cities. These results suggest that the positive effects of a stable currency fall disproportionally on secondary cities, implying price stability not only has macroeconomic benefits, but also developmental benefits since secondary cities and rural areas are on average, poorer than main cities.     

Earnings Forecasts and Price Efficiency after Earnings Realizations: Reduction in Information Asymmetry through Learning from Price*

When information asymmetry is a major market friction, earnings forecasts can lead to higher price efficiency even after the information in forecasts completely dissipates upon earnings realizations. We show this in an experimental market that features information asymmetry (i.e., some traders possess differential private information). Earnings forecasts reduce information asymmetry and lead to prices that reflect a greater amount of private information. Traders can learn more about others' information from prices. This information learned from past prices continues to reduce information asymmetry and improve price efficiency even after earnings realizations. We contribute to the disclosure literature by showing the evidence that the learning‐from‐price effect amplifies the impact of public disclosure on price efficiency.     

Price and Output Stability under Price-Level Targeting

It is commonly believed that a monetary policy that targets the price level reduces the long-term variability of the price level, but only at the cost of increased variability of both inflation and output. We develop a model in which the one-step-ahead variance of output and the price level are lower under price-level targeting than under inflation targeting. This increased stability under price-level targeting works through an interest-rate channel that, to our knowledge, has not previously been emphasized in the literature. Surprisingly, if the sensitivity of demand to the real rate of interest is high enough, then the variance of inflation can also be lower under price-level targeting than under inflation targeting.     

THE DEMAND FOR FOOD IN SOUTH AFRICA1

Food consumption is an important issue in South Africa, given its relation to poverty and deprivation. With the pressing need to increase food security, understanding the determinants of the demand for food and having some estimates of the likely impact of price and income changes has become a vital task. There is, however, surprisingly little economic research on this topic and almost none in recent times. This paper provides a comprehensive empirical analysis of the demand for food in South Africa for the years 1970‐2002. It moves beyond the usual static modelling approach in using a general dynamic log‐linear demand equation and a dynamic version of the almost ideal demand system, to provide estimates of the short‐ and long‐run price and expenditure demand elasticities.     

政府调控、住房需求结构与住房价格：一个动态模型

垄断土地所有权的政府如果具有短期政绩目标函数,他们对土地的控制会使房地产预期价格具有不断上涨的下鞅性,这会提高住房的投机性需求。本文建立了一个住房价格动态模型,在住房价格服从下鞅性的条件下分析住房价格和住房需求结构的动态,发现并不是所有的初始点都会收敛到稳态均衡点,有些初始点会沿着一个稳定的需求结构不断推动价格上涨。对于这些初始点,政府的调控政策至关重要。我们在相位图中分析了政府各种调控政策对住房需求结构和房地产价格变动路径的影响,发现在所有的调控措施中,最有效的调控政策是通过改进土地产权制度来改变投机需求者的预期,减少住房投机需求,使价格收敛到一个较低的稳态水平上。