Network planning of fuelling service stations in a near-term competitive scenario of the hydrogen economy

Hydrogen can be viewed as the flexible automotive fuel of the future. However, many issues related to its use have not been sufficiently investigated. One such issue concerns hydrogen logistics and distribution throughout a territory. One near-term scenario over the next decade is likely to include distribution procedures that are similar to those currently used for petrol products. In this scenario, the conversion of petrol service stations into hydrogen distribution points will progressively be implemented. Petrol companies will then represent one of the major categories of hydrogen producers. They will thus have to select, from a cost/benefit standpoint that accounts for competing companies expected to offer the same service throughout a territory, the most convenient and effective locations for hydrogen distribution. The current paper presents a model for planning a network of service stations of a given company within a competitive framework. A case study of a specific territory in northern Italy is presented and discussed.     

General competitive equilibrium of the spatial economy : Two Teasers

The local indivisibility of space complicates general equilibrium analysis. Mazzoleni and Montesano (1984, p. 286), suggest that the usual reasoning of the non-spatial analyses of competitive equilibrium can be performed in the context of a commodity space that contains subsets of land. This space, however, lacks a linear structure, so it resists application of the usual reasoning. Two examples will show that Mazzoleni and Montesano's existence results are flawed.     

谈市场经济条件下的企业理财观念

观念的转变具有时间的滞后性 ,因此需要就企业界尚存的传统理财观念进行反思与剖析 ,并按照市场经济规律的内在要求 ,提出与国际惯例接轨的全新理财观念     

Core and competitive equilibria of a coalitional exchange economy with infinite time horizon

The core and competitive equilibria of a large exchange economy on the commodity space ?^∞${?}^{\infty }$ will be discussed. We define the economy as a measure on the space of consumers’ characteristics following Hart and Kohlberg (1974), and prove the existence of competitive equilibria and their equivalence with the core without assuming the convexity of preferences.     

An existence theorem for Cournot–Walras equilibria in a monopolistically competitive economy

We establish an existence theorem for Cournot–Walras equilibria in a monopolistically competitive economy. Instead of the traditional approach which depends on Kakutani’s fixed point theorem, we employ the theories of aggregative games and best reply potential games. We show that, if there exists a representative consumer, under some conditions on preferences and production technologies, the profit maximization game is a (pseudo) best reply potential game. Hence, the existence of the equilibria is proved independently of the well known convex-valued assumption on the best responses. Although our assumptions result in the additive separability on a utility function of a representative consumer, the existence of increasing returns and indivisible productions can be allowed. In our model, it is shown that the game played by firms exhibits strategic substitutes whether the products of firms are substitutes or complements, and this plays an important role for the existence of the equilibria.     

The existence of rational expectations equilibria in a large economy with noisy price observations

Non-revealing rational expectations equilibria exist in microeconomic pure exchange economies in which a continuum of uninformed agents have suitably distributed noisy price observations. Slight dispersion in the prices observed by the subset of uninformed consumers is the key condition for continuity (and smoothness) of aggregate excess demand, although individual demands are discontinuous. It leads to equilibria in which markets approximately clear in a strong sense. The equilibria are obtained by applying a fixed point argument to state-dependent excess demand functions.     

On the probability of entry in potential competition cases

This paper explores, both theoretically and empirically, the extent to which having ‘other potential entrants’ to a market injected into potential-competition cases has been a worthwhile enterprise. This two-pronged attack leads to the conclusion that (he attempt to specifically identify potential entrants probably results in our deluding ourselves as to the likelihood that entry will occur, and that unless a convincing argument can be made to the effect that any given potential entrant from a stockpile of unnamed potential entrants is ‘reasonably likely’ to elect the entry option, expanding lhat stockpile will be similarly misleading.     

On probability models in voting theory

This paper illustrates the use of probability models to study properties of voting rules. In particular, a simple occupancy distribution and its limiting Dlrichlet form are introduced, corresponding to simplifying assumptions about voters' preferences. We use as illustrations the occurrence probability of the Condorcet Paradox, a vintage problem in social choice theory, along with the related concept of Condorcet efficiency, a measure of goodness for voting rules. Further examples include properties of a lottery rule and the vulnerability of certain voting rules to strategic manipulation. Prospects for future work are indicated.     

On the positive correlation property in competitive insurance markets

Most competitive models of insurance markets under asymmetric information predict a positive relationship between coverage and the accident probability. This paper derives the conditions under which this prediction holds true in a general setting involving multiple loss levels and fixed administrative costs. If there is one loss level, this prediction holds necessarily true only if all equilibrium contracts offer strictly positive coverage. With multiple loss levels, the positive relationship between coverage and the accident probability may not hold true even if all contracts offer strictly positive coverage and administrative costs are zero. These results have important implications for empirical testing.     

城市经济的保障体系

提出了城市经济保障体系的概念 ,认为经济保障体系是指城市政府为保证城市内部各项经济活动的顺利进行而实施的一系列保护措施、制度、法规等。指出城市政府应不断完善经济保障体系 ,以减少城市内部的各行其是与无序竞争 ,降低城市经济的运作成本 ,提高城市的经济效益     

On the existence of a probability measure compatible with a total preorder on a Boolean algebra

If an economic agent's beliefs about the relative likelihood of events are characterized by a total preorder ? on the algebra $\text{A}$ of events, the problem arises to know under which conditions, ? is representable by a probability measure. Here we show that there exists a probability measure compatible with a total preorder on a Boolean algebra, if and only if, the Boolean algebra is well bounded, weakly Archimedean, and perfectly separable, this last condition substituting for Villegas' monotone condition used in Chateauneuf and Jaffray (1984); if σ-additivity is required. Villegas' monotone condition, must merely be added.     

On the aubin-like characterization of competitive equilibria in infinite dimensional economies

For an exchange economy with finitely many agents and a commodity space which is infinite dimensional, it is proved that competitive equilibria are the same as allocations belonging to the fuzzy core of the economy. The latter is further characterized as a subset of the ordinary core of a suitably associated continuum economy.

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Riassunto Per un'economia di puro scambio con un numero finito di agenti e uno spazio dei beni di dimensione non necessariamente finita, si prova che gli equilibri Walrasiani possono essere caratterizzati come allocazioni che appartengono al nucleo fuzzy dell'economia. Inoltre, queste ultime allocazioni sono in corrispondenza biunivoca con allocazioni di tipo semplice che si trovano nel nucleo ordinario di un'opportuna economia che ha [0,1] come spazio rappresentativo dello spazio degli agenti.

     

浅析企业会计师在税收筹划中的作用

作为一名企业会计师既要为祖国的税收事业,输送给养;又要为企业节约开支,合理的减少赋税支出。真能做到这一点才称得上是合规合格的会计师。从企业的角度来讲,从纳税的申报,到各种税费的交纳,这一过程中涉及很多名目,怎样利用各种税收优惠政策,做好缴税筹划,降低企业的税务成本,使企业的利润实现最大化,是会计师应尽的职责。本文从会计...     

谈知识经济时代的企业创新

知识经济时代的到来给我国的企业带来了机遇与挑战,文章就何为知识创新,知识创新的特点以及应对知识创新进行了简单的阐述。