Price‐Match Announcements in a Consumer Search Duopoly

Using a model of sequential search, we show that announcements to price‐match raise prices by altering consumer search behavior. First, price‐matching diminishes firms’ incentives to lower prices to attract consumers who have no search costs. Second, for consumers with positive search costs, price‐matching lowers the marginal benefit of search, inducing them to accept higher prices. Finally, price‐matching can lead to asymmetric equilibria where one firm runs fewer sales and both firms tend to offer smaller discounts than in a symmetric equilibrium. Price increases grow in the proportion of consumers who invoke price‐matching guarantees and in the level of equilibrium asymmetry.     

House Price Dynamics with Household Debt: The Korean Case*

This paper revisits the long‐run determinants of house prices, and analyzes the house price dynamics using Korean data taking into account the close relationship between house prices and household debt. The results of cointegrating regression indicate that the major portion of the rise in house prices in Korea over the last 15 years can be explained by changes in macro variables such as household income, the demographic structure, the user cost of home ownership and the housing stock supply. The results also confirm that house prices are, indeed, closely linked to the steep increase in household debt seen over this period. Estimation of an error correction model shows that the extent of convergence of actual house prices to their long‐run equilibrium path has weakened somewhat since the global financial crisis while the speed of convergence has slowed, indicating structural changes in the Korean housing market. Finally, a forecast for house prices over the next several years suggests that they are unlikely to rise as sharply as they did in the 2000s, given the likely changes in the macro‐financial environment, and that their future path will be closely associated with that of the household debt‐to‐income ratio.     

A time‐series analysis of Zimbabwe's corn sales to the Grain Marketing Board

This article considers methods of cointegration testing to construct a model of Zimbabwe ‘s corn sector. Corn production, sales of corn to the government, the price of corn, and price of beef are linked together in one long‐run equilibrium (cointegrating) relation. Only the price of beef is not weakly exogenous to perturbations in this relation. That is to say, when these variables are out of long‐run equilibrium, it is through subsequent changes in the price of beef that equilibrium is restored. The other variables do not respond to a long‐run disequilibrium. Short‐run forecasts from this model are compared with expert opinion forecasts made by the government's marketing board. Possibilities for improvement in long‐run forecasting and planning are discussed.     

The role of market imperfections in the relationship between housing prices and household credit: Evidence from Taiwan

Given the credit market imperfections in Taiwan, this paper examines the threshold effects in the adjustment towards the long‐run equilibrium relationship between housing prices and household credit. The empirical findings verify the potential for regime shifts in the dynamically adjusted relationship between housing prices and household credit. Only when the benefits cover the cost of market imperfections, do housing and credit markets trigger convergence to their long‐run equilibrium. The hidden effect of the limitations on housing and credit markets is to raise the thresholds of the self‐adjustment mechanisms. As a result, economic boom‐bust cycles will be more severe and increase the fragility of financial sectors.     

Dynamic simulations on overshooting of flexible commodity prices with a modified arbitrage condition

Applying a Neo‐Keynesian approach, this study investigates whether in the short run flexible commodity prices overshoot their long‐run equilibrium whenever there is a monetary change. Two differential equations are generated depicting the adjustment paths for commodity prices and prices of manufactures. With a modified arbitrage condition that incorporates convenience yield, flexible commodity prices are shown to overshoot their long‐run equilibrium when compared with less‐flexible prices of manufactured goods. Simulation results support the breakdown of money neutrality in the short run. Inflation rate and degree of rigidity of prices of manufactures are shown to have a significant effect on the adjustment paths. Convenience yield did not influence the adjustment mechanism.     

Revisiting the Exchange Rate Pass‐Through to Inflation in Africa’s Two Largest Economies: Nigeria and South Africa

This paper revisits the exchange rate pass‐through (ERPT) to inflation in Nigeria and South Africa by incorporating structural breaks and using time series variables, namely the consumer price index, nominal effective exchange rate, gross domestic product, and crude oil price. Based on the Maki cointegration test and a flexible estimation approach of the Autoregressive Distributed Lag (ARDL) model, our empirical evidence suggests that the long‐ and short‐run ERPT to inflation is complete for Nigeria, while for South Africa it is incomplete both in the long run and short run. This result indicates that prices are stickier in South Africa compared to Nigeria. The comparison between Nigeria and South Africa confirms the role of inflation targeting and central bank credibility on the ERPT. The results divulge further that output growth in Nigeria increases inflation in the long run while it is anti‐inflationary in the short run. For South Africa, the effect of output growth is negatively insignificant. In addition, the long‐run effect of oil price is negative and significant for Nigeria, while for South Africa the short‐run effect of oil price is positive and significant. Therefore, the findings of this paper will assist the monetary authorities to achieve monetary policy objectives.     

Macroeconomic Effects of Commodity Price Shocks in a Low‐income Economy: The Case of Tobacco in Malawi

A major concern for developing economies is a dependence on commodities when their prices are volatile as a major change in the international commodity price can have important implications for economic growth. While some cross‐country studies exist, there is lack of country specific studies that take into account the different characteristics of low‐income economies. This paper contributes to the growing literature by considering the case of Malawi and the macroeconomic impact of price shocks in its major export crop of tobacco. Using a structural vector autoregression (SVAR) approach on quarterly Malawian data from 1980:1 to 2012:4, the paper establishes that a positive tobacco price shock has a significant positive impact on the country's gross domestic product, decreasing consumer prices and inducing real exchange rate appreciation. The results are robust to alternative specifications of a SVAR on difference stationary data and cointegrating VAR. The cointegrating VAR confirms the existence of a long run‐relationship among the variables and causality that runs from tobacco prices.     

不确定需求、垂直协调与电力市场结构

本文考虑一个在发电和零售环节均为完全竞争的电力市场。电力以事先确定的线性价格销售给用户,而电力总需求不确定。模型表明,如果企业的发电量与边际发电成本之间的协方差为正,即两个随机变量之间有正的线性关联度,那么在短期均衡中,垂直分离导致较高的电力价格和发电企业利润。在长期均衡中,垂直分离导致发电企业的过度进入,形成较高的电价和较低的社会福利水平。本文的结论对我国正在进行的电力体制改革有一定参考意义。     

Illegal Cartel Overcharges in Markets with a Legal Cartel History: Bitumen Prices in South Africa

In recent years, South African competition authorities have initiated a number of price‐fixing cases in markets where cooperation among competitors was legal and often encouraged. These markets present economists with special difficulties when estimating cartel overcharges. Conventional approaches often rely on temporal approaches, where pricing during the cartel period is compared with prices in a competitive period. In markets with a legal cartel history, a competitive price cannot be identified in the period preceding illegal collusion. Structural change also reduces data, and hence the robustness of temporal models. Spatial approaches, where prices are compared with those in other countries, offer a better alternative. The paper studies the performance of temporal and spatial approaches in estimating overcharge in the context of a bitumen price‐fixing case. The results suggest that, while the bitumen cartel may have responded to cost and demand shocks in a similar way to how players in more competitive markets respond, it was still cushioned by a large monopoly premium: the long‐run level of South African bitumen prices are higher than in comparable competitive markets. The findings have implications for the study of transition dynamics from legal to illegal cartel regimes and for the detection of cartels.     

住房贷款与房地产价格关系的实证研究——来自深圳的证据

本文围绕住房贷款与住房价格的关系展开研究,将住房贷款与住房价格视为内生变量,将购买住房成本、二手住房价格、住房供求缺口、收入住房价格比视为外生变量,采用深圳市2006年1月至2008年5月的月度数据估计了包括2个内生变量、4个外生变量的VECM模型。实证结果表明：深圳住房贷款与住房价格之间存在长期均衡关系,中央银行信贷数量调控效果要优于利率价格调控效果,银行业住房信贷政策整体上讲是稳健的,基于此并针对有关结论提出了政策建议。     

How Aid Tying Can Impose Additional Cost on Aid Recipients: Evidence on Ghana

Abstract: This study investigates the prices of tied foreign aid imports by estimating the price differentials between tied aid imports and non‐aid imports from bilateral sources to Ghana. The study finds a significant mark‐up on the prices of tied aid imports relative to non‐aid imports, which translates into substantial cost to Ghana. Several reasons, both in Ghana and in the donor countries, could be found for the estimated price differentials. Ghana needs to take steps to improve its investment climate, as a way of reducing investment risk, which in turn will enhance the confidence of export financiers to reduce the incentive to mark up prices of tied commodities. On the part of donor countries, there may be need to examine the market for the supply of aided commodities towards the liberalization of such markets. It is suggested that although the higher costs on tied imports may be a necessary price Ghana had to pay to obtain aid, the associated cost provides a case for the cancellation of the bilateral aid debt to Ghana.     

Existence and uniqueness of marginal cost pricing equilibrium

This paper considers a regulated monopoly that is subject to a marginal cost pricing policy. A marginal cost pricing equilibrium is a price-subsidy combination for which price equals marginal production cost and any losses are offset by the lump-sum subsidy. Employing basic degree theoretic results, conditions are established under which a marginal cost pricing equilibrium exists and is unique.     

Prices and production: agricultural supply response in fourteenth‐century England

This article challenges the growing consensus in the literature that medieval manorial managers were price responsive in their production decisions. Using prices of and acreages planted with wheat, barley, and oats on manors held by the bishop of Winchester from 1325 to 1370, price elasticities of supply are estimated for each grain in aggregate and on each particular manor. Aggregate price elasticities of supply for wheat, barley, and oats were rarely statistically significant and when significant were very low compared with elasticities estimated for developing and developed countries in the nineteenth and twentieth centuries. The low levels of agricultural supply response in fourteenth‐century England suggest that commercialization was not as dominant in the medieval economy as has been argued. Thus, structural changes in the economy, such as the leasing of demesnes, the growth of wage labour, and the end of villeinage, may have been more important than price fluctuations in driving long‐run economic change after the Black Death. Likewise, a shift from low price responsiveness to higher price responsiveness could have been an important part of the capitalist transformation of agriculture in the early modern period.     

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.     

Housing Markets in China and Policy Implications： Comovement or Ripple Effect

The overheated housing market has recently become a top priority of the Chinese authorities and whether the ripple effect exists is key to understanding this housing issue. The present paper uses a cointegration estimation technique for six first-tier Chinese cities during the 2003-2013 period to show that the comovements among housing prices in China are fully reflected in a long-run equilibrium. Using the Toda- Yamamoto causality test, the ripple effect is found to be characterized by a lead -lag relationship. More importantly, it is found that Beo＇ing is the main source of housing price appreciation in China, and should be targeted as the regulatory object to efficiently resolve the troubles in this increasingly high housing-price era.     

The Declining Value‐relevance of Accounting Information and Non‐Information‐based Trading: An Empirical Analysis*

Recently, a growing body of literature has suggested that financial statements have lost their value‐relevance because of a shift from a traditional capital‐intensive economy to a high‐technology, service‐oriented economy. These conclusions are based on studies that find a temporal decline in the association between stock prices and accounting information (earnings and book values). This paper empirically tests a theoretical prediction arising from the noisy rational expectations equilibrium model that suggests that the decline could be driven by non‐information‐based (NIB) trading activity, because such trading reduces the ability of stock prices to reflect accounting information. Specifically, Dontoh, Radhakrishnan, and Ronen (2004) show that when NIB trading increases, the R²s of a regression of stock price on accounting information declines. Our empirical tests confirm this prediction; that is, the decline in the association between stock prices and accounting information as measured by R²s is driven by an increase in NIB trading.     

七月酷暑 光伏过冬

一度高速发展的中国光伏产业,而今内外交困,陷于停产或半停产。如何捕捉"危"中之"机"?八字药方:做强企业,做大市场。     

Strategic Intrafirm Innovation Adoption and Diffusion

A theory of oligopolistic innovation adoption is developed in which intrafirm diffusions occur because the marginal cost of adoption is increasing in the rate of adoption. The equilibrium intrafirm diffusion curve is S-shaped or concave, as are empirically observed ones. This diffusion curve is more likely to be S-shaped the more competitive the industry, the larger the marginal cost of adoption or the pre-innovation unit cost of production, or the smaller the demand. The diffusion is longer, and so the extent of adoption at any date is lower the more competitive the industry, the larger the marginal cost of adoption or the pre-innovation unit cost of production, or the smaller the demand. A surprising result is that an increase in the unit cost reduction from the innovation has an ambiguous effect on diffusion. Obviously, a larger cost reduction allows each firm to earn a larger flow profit at every date from the same rate of adoption. However, a more subtle effect is that it also allows the firm to earn the same flow of profit with a slower rate of adoption, and so lower adoption costs. That is, the firms also have an incentive to spread out the diffusion over a longer period of time to save on adoption costs.     

PURCHASING POWER PARITY WITH RANK TESTS FOR NONLINEAR COINTEGRATION IN AFRICAN COUNTRIES

This study applies nonlinear cointegration to assess exchange rates with the corresponding relative prices and aggregate price levels for 20 African countries. We find that a nonparametric rank test has higher power than parametric testing procedures; a true data‐generating process of exchange rate is in fact a stationary nonlinear process. We examine the validity of purchasing power parity (PPP) from the nonparametric nonlinear point of view and provide robust evidence that clearly indicates PPP holds true for these countries. Hence, the long‐run African countries exchange rate adjustments are in equilibrium with the relevant fundamentals as suggested by the PPP hypothesis in a nonlinear way.     

An empirical analysis of the unit labor cost-product price relation in the U.S. economy

This article tests for cointegration between unit labor costs and the level of product prices in four sectors of the U.S. economy: the aggregate business sector, the nonfinancial corporate sector, durable manufacturing, and nondurable manufacturing. A finding of cointegration for most specifications supports the existence of long-run labor market equilibrium for producers and suggests estimation of error-correction models to examine the dynamic relationships. In every sector except nondurable manufacturing, error-correction model estimates indicate there is a mutual feedback relationship between unit labor costs and prices. Controlling for deviations from full employment, oil price shocks, and the Nixon wage and price controls, the results also provide evidence of significant nominal wage indexation in U.S. labor markets. Throughout the economy there appears to exist both effective neoclassical wage and price adjustment mechanisms to maintain labor market equilibrium and short-run rigidities which may contribute to deviations from full employment outcomes.