A MODEL OF MONOPOLISTIC COMPETITION WITH PERSONAL INCOME DISPERSION

We introduce non‐homothetic preferences in the Dixit–Stiglitz model of monopolistic competition, and enquire about the effects of a change in income dispersion on the firms’ optimal decisions and market equilibrium. Income dispersion, modeled as a mean preserving spread, is shown to affect only the degree of product differentiation under the standard negligibility hypothesis on the firms’ decision making process, while it generates a positive co‐movement of demand and demand elasticity, when this assumption is removed and the price index effect is taken into account.     

企业间反需求状况定价行为:价格总水平的“内在稳定器”

运用重复博弈的方法建立了一个企业间长期价格竞争模型,用于论证这样一个机制:随着市场需求的波动,企业为实现自身利益最大化所采取的非合作定价行为会与市场需求状况呈相反方向,从而对宏观价格总水平起到一种稳定器的作用。同时对该模型在我国的应用及模型本身可能存在的问题进行了探讨。     

Product Market Competition and Lobbying Coordination in the U.S. Mobile Telecommunications Industry

This paper empirically investigates market behavior and firms?? lobbying in a unified structural setup. In a sequential game, where firms lobby for regulation before they compete in the product market, we derive a testable measure of lobbying coordination. Applying the setting to the early U.S. cellular services industry, we find that lobbying expenditures, as measured by campaign contributions, and market conduct were consistent with a one-shot Nash equilibrium and that price caps were binding on average. Furthermore, campaign contributions from cellular firms effectively lowered the burden of the price caps and reduced production costs.     

A macroeconomic model of international price discrimination

This paper builds a baseline two-country model of real and monetary transmission in the presence of optimal international price discrimination by firms. Distributing traded goods to consumers requires nontradables, making the price elasticity of demand country-specific and a function of the exchange rate. Profit-maximizing monopolistic firms drive a wedge between prices across countries, optimally dampening the response of import and consumer prices to exchange-rate movements. We derive general equilibrium expressions for the pass-through into import and consumer prices, tracing the differential impact of real and monetary shocks on marginal cost and markup fluctuations through the exchange rate.     

EXISTENCE OF A NONNEGATIVE EQUILIBRIUM PRICE VECTOR IN THE MEAN-VARIANCE CAPITAL MARKET

We derive a necessary and sufficient condition for the existence of a nonnegative equilibrium price vector under which the total demand and supply of each asset balances in the standard mean-variance capital market. Also, we give an explicit formula for such a price vector. This formula shows that the price of assets is an increasing function of , the weighted average of the requested rate of return of individual investors, which tends to infinity as approaches the expected rate of return on the market portfolio. Further, we construct a macroeconomic index which gives information about the soundness of the capital market.     

New firms and labor market entrants: Is there a wage penalty for employment in new firms?

In this paper, we explore the role of new firms as an entry point to the labor market. Because the vast majority of new firms are short-lived, it is a risky decision to accept employment in a new venture. It can be argued that individuals with little (or no) labor market experience are more willing to accept the high risks associated with employment in new firms. Hence, new firms may work as an entry point to the labor market. Nevertheless, some research concludes that one disadvantage of employment in a new firm is that new firms pay less (Shane in Small Bus Econ 33:141–149, 2009). However, this empirical conclusion is primarily based on literature on the wage penalty of small firms. In this paper, we study whether the wage penalty of employment in a new firm persists if we focus solely on labor market entrants. In the empirical analysis, we employ an employer-employee matched dataset that covers the Swedish population during the period from 1998 to 2008. We use the propensity score matching method to study the wage differences between labor market entrants employed in new and incumbent firms. We find an average wage penalty of 2.9 % for labor market entrants employed in new firms over the studied period.     

Impact of international trade on unemployment under oligopoly

By studying a two-sector general equilibrium model in which firms engage in oligopolistic competition and unemployment is a result of the existence of efficiency wages, we derive the following results analytically. A country's comparative advantage in producing manufactured goods increases with the level of efficiencies in the labor market. The opening of international trade leads to the equalization of wage rates even though countries differ in their factor endowments and labor market efficiencies. If countries have the same level of labor market efficiencies but differ in their endowments of labor and land, the opening to international trade leads to an increase in the wage rate in both countries.     

Testing a model of signals in the IPO offer process

This study examines agency and market signals related to a sample of high-technology firms seeking an initial public offering (IPO). We test a model of the IPO offer process in high-technology firms. Results indicate that certain pre-market and primary market factors affect the offer price received by entrepreneurs and investors, while the secondary market factor did not. Our model may help entrepreneurs position their organization prior to and during the IPO process.     

Optimal Timing of Advertising with Demand Spillovers

We construct a model of a horizontally differentiated duopoly with demand spillovers in which advertising influences the willingness-to-pay of consumers for products and thereby affects not only market share, but also the level of market demand. Furthermore, firms decide the timing as well as the level of advertising. We first derive a subgame perfect Nash equilibrium and Stackelberg equilibria in the advertising competition. Then, using the framework of an endogenous timing decision game with an observable delay (i.e., Hamilton and Slutsky, Games Econ Behavior 2: 29–46, 1990), we consider the optimal timing of advertising. We demonstrate that the optimal timing depends on the degree of demand spillovers and the product substitutability. In particular, if there are sufficient asymmetric demand spillovers between firms, there is a unique Stackelberg equilibrium in the advertising competition, in which the firm providing the product with small (large) demand spillovers chooses to invest in advertising early (late), regardless of the mode of competition.     

OPTIMAL EXECUTION OF A VWAP ORDER: A STOCHASTIC CONTROL APPROACH

We consider the optimal liquidation of a position of stock (long or short) where trading has a temporary market impact on the price. The aim is to minimize both the mean and variance of the order slippage with respect to a benchmark given by the market volume‐weighted average price (VWAP). In this setting, we introduce a new model for the relative volume curve which allows simultaneously for accurate data fit, economic justification, and mathematical tractability. Tackling the resulting optimization problem using a stochastic control approach, we derive and solve the corresponding Hamilton–Jacobi–Bellman equation to give an explicit characterization of the optimal trading rate and liquidation trajectory.     

The influence of demand factors on dynamic competitive pricing strategy: An empirical study

This empirical paper investigates the relationship between the dynamic strategic interactions among competitors in a component market and demand factors in the market for the end product. The structure of competition in the US microprocessor (MPU) industry is analyzed using data on prices and sales in both the MPU market as well as the market for personal computers. The pattern of dynamic strategic interaction between competing firms in this market on a key decision variable, price is studied. Non-nested model comparison tests based on equilibrium solutions derived for specific differential games are applied to identify the mode of competitive strategy between pairs of competing brands. The empirical fit to the longitudinal and cross-sectional data, of alternative models of competition, independent (Bertrand?CNash), Stackelberg leader?Cfollower, and Collusion, is used to determine which dynamic model best describes actual competitive behavior over the life of each MPU. Demand for the product market which is downstream from microprocessors, that for personal computers, is estimated using a generalized diffusion model with price effects. Data from the markets for desktop and laptop computers are analyzed at the level of computer vendor and internal microprocessor. Patterns are uncovered, linking downstream demand parameters with upstream competitive strategy. There is evidence to suggest that when there are strong diffusion effects driving sales of both the competing computer brands, there is a higher likelihood of Bertrand?CNash competition among MPU firms. However, when there are higher cross-price effects (substitutability) among personal computer brands there is a greater chance of Stackelberg leader?Cfollower price competition. When self-price effects are relatively high, the likelihood of Bertrand?CNash competition among MPU firms increases. Furthermore, when the potential demand for the computer product category is high, there is a higher likelihood of Bertrand?CNash pricing in the MPU market.     

International trade and macroeconomic dynamics with labor market frictions

This paper studies how labor market frictions affect the consequences of trade integration in a two-country dynamic stochastic general equilibrium model with heterogeneous firms and endogenous producer entry. Two main results emerge. First, trade integration is beneficial for welfare by inducing higher productivity, but unemployment can temporarily rise during the transitional adjustment. Labor market rigidities reduce gains from trade, even though they can mitigate short-run employment losses. Second, consistent with the data, the model predicts that stronger trade linkages lead to increased business cycle synchronization. The strength of this effect, however, depends on the labor market characteristics of the integrating partners.     

Market Volatility and Feedback Effects from Dynamic Hedging

In this paper we analyze the manner in which the demand generated by dynamic hedging strategies affects the equilibrium price of the underlying asset. We derive an explicit expression for the transformation of market volatility under the impact of such strategies. It turns out that volatility increases and becomes time and price dependent. The strength of these effects however depends not only on the share of total demand that is due to hedging, but also significantly on the heterogeneity of the distribution of hedged payoffs. We finally discuss in what sense hedging strategies derived from the assumption of constant volatility may still be appropriate even though their implementation obviously violates this assumption.     

马克思供求理论研究

马克思的供求理论是其劳动价值论体系的重要组成部分 ,供求理论的建立是马克思劳动价值论体系的最终完成。马克思关于供给与需求及其关系、市场供求与市场价值、市场供求与市场价格、市场供求与市场竞争等问题的论述是供求理论的重要内容。学习和运用马克思的供求理论 ,对于完整理解马克思的劳动价值理论 ,对于完善市场机制运行和促进市场经济发展具有重要意义。     

能源冲击对中国部门间劳动力市场需求结构的影响

本文在可计算一般均衡(CGE)模型的基础上,结合2007年社会核算矩阵(SAM),模拟了国际能源冲击下中国宏观经济活动以及微观劳动力市场的变动情况,同时具体分析了能源冲击对部门间劳动力市场需求结构的影响和传导机制。研究发现,在面对能源冲击时,不同部门的劳动力需求变化也各不相同,制造业、农林牧渔业等劳动力密集型部门倾向于提供更多的劳动岗位,并且这些岗位主要是面向对能源有较强替代性的技术工人,而其余大部分部门则倾向于缩减劳动岗位的供应;在收入方面,随着能源价格上涨,各类工人收入都会出现不同程度的下降,其中以技术工人降幅最大,产业工人次之,而农业工人的收入在能源价格上涨到一定程度后会出现上升。     

高油价困局

传统矿物能源的不可再生性,决定了过度依靠单一类型的自然能源所面临的系统性风险是无法回避的。＂世界经济血液＂的称号体现出石油在世界经济中的价值与地位,而华尔街的一句名言＂千万不要试图预测油价＂,又令其充满了神秘色彩。     

Do consumers value price transparency?

We examine the role of price transparency in consumer preferences and demand. We assemble a detailed dataset on the driving school industry in Portugal to quantify how firms present the price of the course of instruction, and its individual components, to potential students. Our unique data allows us to estimate a structural model of school choice and measure the impact of varying levels of price information on demand. The results show that consumers are willing to pay a significant amount for price transparency, on average 11% of the service price, and that consumer demographics drive heterogeneous preferences for transparency.     

The externalities of credit default swaps on stock return synchronicity

We examine the externality effect of customer firms’ credit default swap (CDS) trading on the stock price informativeness of supplier firms. Our empirical results show that firms with a high proportion of sales to CDS referenced customers tend to have more firm-specific embedded information in their stock prices and thus higher stock price informativeness, which is associated with a lower level of stock return synchronicity. We provide new evidence of CDS trading externality on equity market information environments along the supply chain.     

Brand and Quantity Choice Dynamics Under Price Uncertainty

We develop a model of household demand for frequently purchased consumer goods that are branded, storable and subject to stochastic price fluctuations. Our framework accounts for how inventories and expectations of future prices affect current period purchase decisions. We estimate our model using scanner data for the ketchup category. Our results indicate that price expectations and the nature of the price process have important effects on demand elasticities. Long-run cross price elasticities of demand are more than twice as great as short-run cross price elasticities. Temporary price cuts (or deals) primarily generate purchase acceleration and category expansion, rather than brand switching.     

The capital market spillover effect of product market advertising: Evidence from stock price synchronicity

We analyze whether product market advertising has a spillover effect on stock price synchronicity by transmitting firm-specific information to the capital market and attracting more investor attention. Using a sample of Chinese listed firms from 2009 to 2017, we find that firms with greater advertising expenditures have lower stock price synchronicity. The results are robust after we address endogeneity concerns. In accord with our hypothesis that product market advertising increases the amount of firm-level information capitalized into stock prices through the information channel, we find that the impact of advertising on synchronicity is more pronounced for firms with a higher degree of information asymmetry and firms in the consumer-product industry. Further tests show that product market advertising enhances the ability of current period returns to reflect future earnings, and thus rules out that the negative relationship between advertising and synchronicity is driven by noise trading. Our results imply that product market advertising plays an informative role and improves information efficiency in a capital market.