外国直接投资的国际贸易效应:基于我国行业数据的分析

本文在Rybczynski定理的基础上考察了外国直接投资与国际贸易之间替代和互补的关系。在理论分析部分,建立了一个简化的要素特定模型,分析了特定部门初始贸易状态与部门产出以及外国直接投资的关系。在实证分析部分,用我国各行业外国直接投资和贸易的数据对其进行了检验,结果发现外国直接投资对我国各行业贸易的影响都很显著,但是具体的替代和互补关系却因时期不同而不同。     

CHOICE OF TECHNIQUES AND THE THEOREM OF OKISHIO

This paper discusses the sufficiency of the »viability condition« of Okishio's theorem for signalling profit improving choice of techniques. Some counter-examples are given for linear technologies with joint production. Technological change which conform to the prediction of the theorem - choices made on the basis of the viability condition lead to higher average rate of profit - is called regular, and sufficient conditions for regularity are specified.     

The effect of variation in foreign production on domestic factor prices

In this article, the effects of random versus nonrandom foreign production on the average commodity price ratio and on average domestic factor prices are examined within the context of the Heckscher-Ohlin framework. It is shown that the average price ratio is changed when production is random. Thus, the condition derived by Murray C. Kemp and Chulsoon Khang for expected factor prices to be changed when the commodity price ratio is random, must be altered in accordance with the Stolper-Samuelson theorem.     

The Fundamental Theorem of Asset Pricing under Proportional Transaction Costs in Finite Discrete Time

We prove a version of the Fundamental Theorem of Asset Pricing, which applies to Kabanov's modeling of foreign exchange markets under transaction costs. The financial market is described by a   d × d   matrix-valued stochastic process  (Π _t ) ^T _{t =0}  specifying the mutual bid and ask prices between d assets. We introduce the notion of "robust no arbitrage," which is a version of the no-arbitrage concept, robust with respect to small changes of the bid-ask spreads of  (Π _t ) ^T _{t =0}  . The main theorem states that the bid-ask process  (Π _t ) ^T _{t =0}  satisfies the robust no-arbitrage condition iff it admits a strictly consistent pricing system. This result extends the theorems of Harrison-Pliska and Kabanov-Stricker pertaining to the case of finite Ω, as well as the theorem of Dalang, Morton, and Willinger and Kabanov, Rásonyi, and Stricker, pertaining to the case of general Ω. An example of a  5 × 5  -dimensional process  (Π _t )² _{t =0}  shows that, in this theorem, the robust no-arbitrage condition cannot be replaced by the so-called strict no-arbitrage condition, thus answering negatively a question raised by Kabanov, Rásonyi, and Stricker.     

A REFUTATION OF THE COMMODITY EXPLOITATION THEOREM

This note is to show that the generalized commodity exploitation theorem put forward by Bowles and Gintis and Roemer is nothing but an alternative form of the Hawkins–Simon condition for given technical data, and that it has nothing to do with exploitation. That is, the Hawkins–Simon condition means a mere possibility of an economic system to produce a surplus in each commodity, and as such does not guarantee the existence of positive profits. To consider exploitation or the existence of positive profits, we need to introduce prices at which unequal exchanges may be carried out.     

我国大宗商品出口需求价格弹性与最优出口关税——以稀土为例

出口税作为最常用的一种出口限制措施近来在各国贸易政策中屡见不鲜。现有文献对依据"勒纳对称定理"得到的最优关税结论存有异议。文章首先研究了大国作为唯一出口国情况下最优出口关税的决定,认为已有文献关于最优出口税结果不同的根源在于假设差异所致,然后,分析了非唯一出口国情况下大国最优出口关税的决定,最优出口关税和出口商品的需求价格弹性、本国出口所占世界市场份额和其他出口国的供给弹性有关,最后,以稀土为例,采用面板数据模型测算了我国稀土出口的需求价格弹性和需求收入弹性,并得到了我国稀土出口的最优关税。     

IDENTIFYING THE LINDAHL EQUILIBRIUM WITHOUT TRANSFERS AS A SOCIAL OPTIMUM

The Lindahl equilibrium is an important solution concept in economies with externalities or public goods. In this paper, a ‘Negishi‐type’ theorem that connects the Lindahl equilibrium without transfers with the social optimum solution is proposed and proved. The theorem states that the solution of a social planner's problem with the social welfare weights proportional to the inverse of the private shadow prices of externalities in an auxiliary Nash equilibrium is the Lindahl equilibrium without transfers. To verify the theorem constructively, an algorithm for finding the Lindahl equilibrium is developed. Its efficacy is demonstrated through a numerical example.     

THE HEX GAME THEOREM AND THE ARROW IMPOSSIBILITY THEOREM: THE CASE OF WEAK ORDERS

The Arrow impossibility theorem when individual preferences are weak orders is equivalent to the HEX game theorem. Because Gale showed that the Brouwer fixed point theorem is equivalent to the HEX game theorem, this paper indirectly shows the equivalence of the Brouwer fixed point theorem and the Arrow impossibility theorem. Chichilnisky showed the equivalence of her impossibility theorem and the Brouwer fixed point theorem, and Baryshnikov showed that the impossibility theorem by Chichilnisky and the Arrow impossibility theorem are very similar. Thus, Chichilnisky and Baryshnikov are precedents for the result—linking the Arrow impossibility theorem to a fixed point theorem.     

ANALYTICAL COMPARISONS OF OPTION PRICES IN STOCHASTIC VOLATILITY MODELS

This paper gives an ordering on option prices under various well-known martingale measures in an incomplete stochastic volatility model. Our central result is a comparison theorem that proves convex option prices are decreasing in the market price of volatility risk, the parameter governing the choice of pricing measure. The theorem is applied to order option prices under q -optimal pricing measures. In doing so, we correct orderings demonstrated numerically in Heath, Platen, and Schweizer ( Mathematical Finance , 11(4), 2001) in the special case of the Heston model.     

Martingale Measures For A Class of Right-Continuous Processes

The subject of the present paper is the following. Suppose that W is a class of adapted, right-continuous processes on the continuous time horizon [0, 1], and for every stopping time and W , () is bounded below. A necessary and sufficient condition will be given for the existence of a probability measure Q which is equivalent to the original measure and such that each process in W is a martingale under Q . If the processes in W represent the discounted prices of available securities, then the condition given here for the existence of a martingale measure can be interpreted as absence of "free lunch" in the securities market. This is a familiar kind of theorem from the finance literature; the novelty of this paper is that the security prices are not required to be in LP for some 1 p , nor are they assumed to be continuous. Also, the concept of free lunch is invariant under the substitution of the original probability measure by an equivalent probability measure. the assumption that () is bounded below for every W and stopping time is quite natural since prices are nonnegative.
We shall define a class of admissible subjective probability measures and assume that each agent in the economy has selected a subjective probability measure from (hat class. Subjective free lunch for an agent will be defined using his or her subjective probability measure. It will be shown that under an additional condition the existence of free lunch is equivalent to the existence of a common subjective free lunch simultaneously for all possible agents in the economy.     

REVEALED PREFERENCE TESTS OF THE STOLPER?SAMUELSON THEOREM

This article conducts revealed preference tests of the Stolper-Samuelson theorem. If the Stolper?Samuelson theorem holds, one would expect to find a country's relatively scarce factor of production (in this case labor) harmed from trade liberalization and thus opposing trade liberalization. The reverse would be true for its relatively abundant factor of production (in this case capital). Therefore, this article examines representations made before the Canadian House of Commons committee studying the Canadian?U.S. Free Trade Agreement. Assuming representations coincide with the self-interest of the presenters, the effects of trade liberalization on factor returns are inferred. It finds strong support for the proposition that labor behaves as the Stolper?Samuelson theorem would predict and qualified support for capital behaving as the Stolper?Samuelson theorem would predict.     

COST-PRICES WITH VARIABLE RETURNS(*)

In this paper a model of oligopolistic competition is presented. Firms use a mark-up in order to price but the model does not rely necessarily on the assumption of constant returns to scale. An existence theorem is proved for such an economy.     

线性多步法各系数约束条件的证明

<正> 开发高科技产品,争取从较高层次上参与国际分工和竞争,提高企业的国际经营效益已成为我国外向型经济发展中的一大目标。实现这一目标,不仅需要重视技术的研究、产品的开     

Linear Programming and the von Neumann Model

The formal similarity between von Neumann's theorem on maximal growth and (a weak form of) the fundamental theorem of linear programming is striking. The parallelism is explained by considering a simple economy for which the two problems are identical.     

A Characterization of Complete Security Markets On A Brownian Filtration1

This paper provides a characterization theorem for a complete securities market when security prices follow Itô processes on a multidimensional Brownian filtration. This characterization theorem is a special case of Harrison and Pliska (1983), and it clarifies a counterexample provided by Müller (1989).     

Eisenberg's Duality in Homogeneous Programming,Shephard's Duality and Economic Analysis

This note is to reintroduce to the reader Eisenberg's symmetric duality theorem in homogeneous programming problems as a useful tool in economic analysis, and thereby to pay a due tribute to him for one of his mathematical contributions. His duality result has been almost in oblivion during the development of Shephard's duality theory between cost and production, and has seldom been mentioned in the literature about the dualities concerning Shephard's distance function, Luenberger's benefit function and directional distance functions proposed by many authors. We show that from Eisenberg's duality it is possible to derive in a systematic way these dualities so far obtained. We also present a further extension of the duality for generalized directional distance functions. In addition, we explain the relationships between the duality theorem of linear programming and that of homogeneous programming, and show how to apply the latter in those economic models in which linear programming has been utilized.     

概率论在商品流通中的应用

本文介绍了概率论中的中心极限定理的基本内涵,通过商品流通中的实例介绍了中心极限定理在商品流通中抽样检查、商品订购、获利问题的应用,说明了中心极限定理在商品流通中的作用。     

Dynamic Arbitrage‐Free Asset Pricing with Proportional Transaction Costs

This paper studies multiperiod asset pricing theory in arbitrage‐free financial markets with proportional transaction costs. The mathematical formulation is based on a Euclidean space for weakly arbitrage‐free security markets and strongly arbitrage‐free security markets. We establish the weakly arbitrage‐free pricing theorem and the strongly arbitrage‐free pricing theorem.     

Cross Hedging with Currency Forward Contracts

This study examines the behavior of a competitive exporting firm that exports to a foreign country and faces multiple sources of exchange rate uncertainty. Although there are no hedging instruments between the home and foreign currencies, there is a third country that has well‐developed currency forward markets to which the firm has access. The firm's optimal cross‐hedging decision is shown to depend both on the degree of incompleteness of the currency forward markets in the third country, and on the correlation structure of the random spot exchange rates. Furthermore, the firm is shown to be more eager to produce and expand its exports to the foreign country when the missing currency forward contracts between the home and foreign currencies can be synthesized by the existing currency forward contracts. In this case of perfect cross hedging, the separation theorem holds but the full‐hedging theorem may or may not hold. © 2012 Wiley Periodicals, Inc. Jrl Fut Mark