INTEREST RATE PEGS,WEALTH EFFECTS AND PRICE LEVEL DETERMINACY

This paper analyses the issue of price level determinacy in an optimizing general equilibrium model with overlapping generations. It is shown that under a pure interest rate peg wealth effects rule out nominal indeterminacy but give rise to multiple equilibria.     

RE‐EXAMINING THE IMPLICATIONS OF THE NEW CONSENSUS: ENDOGENOUS MONEY AND TAYLOR RULES IN A SIMPLE NEOCLASSICAL MACRO MODEL

This paper re‐examines the impact of endogenous money in a neoclassical model with interest‐sensitive expenditures. It first outlines a benchmark model with exogenous money and the usual full employment and money growth‐determined inflation results. It then replaces exogenous money with endogenous money, which is shown to generate model indeterminacy. Two methods of resolving this indeterminacy are then explored: money illusion and a Taylor rule for monetary policy, a key feature of new consensus models. The paper concludes that endogenous money has negative implications for the behaviour and interpretation of neoclassical and new consensus models.     

Neoclassical theories of stationary relative prices and the supply of capital

In the traditional versions of the neoclassical theory of value and distribution, the stock of existing capital, understood as either an amount of value or an endowment of capital goods, was taken as given together with the available quantities of labour and natural resources. This characteristic of the early neoclassical theories is analysed through comparison with the modern neo‐Walrasian models of stationary equilibrium, where the stock of capital is not among the givens. It is shown here that the attempt to present capital as a factor of production on a par with labour and land led the early neoclassical authors to write the zero‐net‐accumulation condition, which was required by the stationarity of relative prices, in the form of a market‐clearing condition for the supply of and demand for capital. The rate of interest was therefore understood as the price determined by this market. As is known, however, the view of capital as a factor of production and the rate of interest as the price for its use failed to work and involved several problems, some of which are discussed here.     

The Optimal Structure for Public Debt

We study risk‐sharing through public debt in a two‐generations‐overlapping model. If bonds and wage‐indexed social security service a given initial obligation, there exists a set of Pareto‐efficient debt structures. This set is characterized by conflicting interests of current and yet unborn cohorts over the factor‐price risk allocation. If both size and composition of the debt are choice variables, these conflicting interests can be reconciled. Changes in the debt's composition reallocate factor‐price risks, while changes in its size reallocate resources. This separation of risk‐sharing and crowding‐out narrows the set of efficient debt structures until only one remains.     

MARX‐BIASED TECHNICAL CHANGE AND THE NEOCLASSICAL VIEW OF INCOME DISTRIBUTION

This paper empirically tests two competing views about capital–labour substitution at the aggregate level in capitalist economies: the classical model with Marx‐biased technical change versus the neoclassical model. Following Foley and Michl (1999 ), the classical viability condition of technical change is used to draw out two different hypotheses about the profit share in national income corresponding to the two competing models. A stochastic version of the viability condition is empirically tested with data from the Extended Penn World Tables 2.1 using a simple cross‐country estimation strategy. It is found that the data overwhelmingly rejects the neoclassical theory.     

Corporate Environmental Responsibility

This paper offers directions for the continuing dialogue between business ethicists and environmental philosophers. I argue that a theory of corporate social responsibility must be consistent with, if not derived from, a model of sustainable economics rather than the prevailing neoclassical model of market economics. I use environmental examples to critique both classical and neoclassical models of corporate social responsibility and sketch the alternative model of sustainable development. After describing some implications of this model at the level of individual firms and industries, I offer an ethical justification of the sustainability alternative that is derived from the same values that underlie traditional market economics.     

ASSET PRICE BUBBLES IN INCOMPLETE MARKETS*

This paper studies asset price bubbles in a continuous time model using the local martingale framework. Providing careful definitions of the asset's market and fundamental price, we characterize all possible price bubbles in an incomplete market satisfying the “no free lunch with vanishing risk (NFLVR)” and “no dominance” assumptions. We show that the two leading models for bubbles as either charges or as strict local martingales, respectively, are equivalent. We propose a new theory for bubble birth that involves a nontrivial modification of the classical martingale pricing framework. This modification involves the market exhibiting different local martingale measures across time—a possibility not previously explored within the classical theory. Finally, we investigate the pricing of derivative securities in the presence of asset price bubbles, and we show that: (i) European put options can have no bubbles; (ii) European call options and discounted forward prices have bubbles whose magnitudes are related to the asset's price bubble; (iii) with no dividends, American call options are not exercised early; (iv) European put‐call parity in market prices must always hold, regardless of bubbles; and (v) futures price bubbles can exist and they are independent of the underlying asset's price bubble. Many of these results stand in contrast to those of the classical theory. We propose, but do not implement, some new tests for the existence of asset price bubbles using derivative securities.     

The Neoclassical Approach to Induced Technical Change: From Hicks to Acemoglu

This survey article provides a critical overview of the development of the neoclassical theory of induced technical change. From Hicks's introduction of the concept in his Theory of Wages up to the recent literature the strengths and weaknesses of the proposed models and the contexts in which they have been developed are outlined. It is shown that induced technical change has been invoked to explain various long‐run distribution conundrums which could not be explained with standard neoclassical growth theory. The importance of induced technical change for the long‐run distribution of income cannot be doubted. Nevertheless, we show that neoclassical models of induced technical change are still unsatisfactory in a number of respects.     

An antinomy in the theory of comparative advantage

This paper shows that the usual bilateral rule of comparing relative prices under autarky to determine the pattern of trade is not valid for the multicommodity world. In addition, equilibrium world price ratios need not fall between the corresponding price ranges under autarky. Such a paradox disappears under gross substitutability when the third commodity is a nontradeable. For the case of tradeables, an alternative bilateral rule to determine the pattern of trade is proposed. Since the classical constant cost case has been heavily discussed in the literature, we confine ourselves to the neoclassical case.     

Volatility dynamics of NYMEX natural gas futures prices

We examine the volatility dynamics of NYMEX natural gas futures prices via the partially overlapping time‐series model of Smith (2005. Journal of Applied Econometrics, 20, 405–422). We show that volatility exhibits two important features: (1) volatility is greater in the winter than in the summer, and (2) the persistence of price shocks and, hence, the correlations among concurrently traded contracts, displays substantial seasonal and cross‐sectional variation in a way consistent with the theory of storage. We demonstrate that, by ignoring the seasonality in the volatility dynamics of natural gas futures prices, previous studies have suggested sub‐optimal hedging strategies. © 2008 Wiley Periodicals, Inc. Jrl Fut Mark 28:438–463, 2008     

Product Strategy and Antitrust: A Consumer Choice Perspective

Traditionally antitrust law is strongly tied to price theory economics so that prices, costs, profits, and profit sacrifice are typically examined in antitrust cases. This paper proposes broadening traditional antitrust analysis to also explicitly examine the likely effect of allegedly anticompetitive conduct on product options and consumer choice. In order to accomplish this task, this paper proposes that various aspects of marketing strategy should be considered when examining product strategies that are accused of being anticompetitive. This paper further suggests that the current list of inconsistently and poorly defined product strategies used by the courts be augmented by three more straight forward but overlapping categories based on impact on consumer choice: Lock‐Outs, Lock‐Ins, and Hold‐Ups.     

TAX EVASION AND STATE PRODUCTIVITY—AN EXPERIMENTAL STUDY

In an overlapping generations experiment with multiple families participants can support their parents directly and thereby reduce their tax burden or rely on tax‐financed old‐age support. State productivity is captured by the factor with which total tax revenues are multiplied to determine old‐age support. This factor is systematically varied from 0.75 to 1.25. Tax payments depend on declared endowment. Tax evasion is possible, but monitored. Our results suggest that state productivity influences neither direct support of own parents nor tax evasion. The main effect is that rich endowment triggers relatively low support of own parents and high (and more frequent) tax evasion.     

A Linear Multisector Model of “Endogenous” Growth and the Problem of Capital

In this paper a linear multisector model of “endogenous” growth with heterogeneous capital goods is elaborated. The purpose of this exercise is to show that this kind of model is exempt from the capital theory critique put forward against the conventional long-period neoclassical growth model á la Solow. This confirms previous claims that at least some of the “new” growth models are somewhat extraneous to neoclassical analysis and actually exhibit the logical structure of classical theory. In addition it is shown that the use of an intertemporal analysis to establish a correct long-period position is not necessary and that the use of the long-period method may speed up the elaboration of new scientific results.     

CAPITALISTS,WORKERS AND SOCIAL SECURITY

This paper elaborates an exogenous growth model that nests overlapping generations of workers who save for life cycle reasons with dynastic agents who save for bequest reasons (‘capitalists’). The model overcomes Marglin's objection that the overlapping generations framework requires special assumptions about technology, and it also provides a natural environment to revisit Samuelson's analysis of lump‐sum transfers between generations. The ability of a benevolent planner to improve workers' welfare is severely restricted by the control capitalists exercise over the accumulation process. Prefunding social security assumes renewed significance because it overcomes this restriction.     

The Costs of Arbitrage and Futures Market Trading Activity

Abstract Standardizing a futures contract’s specifications to enhance its transfer-ability is problematic for any commodity whose cash market adopts relational contracting procedures. Standardization implies the contract’s value cannot be completely determined by competitive arbitrage order flow, inhibiting the market’s price discovery function, and leaving the futures price susceptible to manipulation. These effects may result in the market’s failure. The model, based on the theory of storage, predicts that contracts with a higher spread-open position price volatility are more likely to contain a range of arbitrage indeterminacy, hence to experience difficulties in sustaining trading. The prediction is supported in an empirical examination of 104 US futures markets. The range of indeterminacy also increases the informational requirements of spread traders, reducing the effectiveness of spread arbitrage in maintaining the equilibrium intertemporal futures pricing relationship. Detailed evidence from 15 US contract markets demonstrates spread arbitrage is less effective in contract markets which subsequently fail.     

关于市场均衡论的反论与反思

研究发现,古典主义经济学乃至新古典主义经济学所奉行的市场均衡模型（包括一般均衡和局部均衡）并非白璧无瑕,关于这一模型的经典著述中隐含着许多反论,而右下斜(斜率为负)的供给曲线以及右上斜(斜率为正)的需求曲线是这些反论的核心。这些反论促成了如下反思：供给价格不等于边际成本;供给表并非来自实践,而是来自传统供给法则的主观拟断;边际收益递减并不决定供给曲线的右上扬,相反倒决定了供给曲线的右下斜趋势,而边际收益递增则决定了供给曲线右上斜的趋势。以上反思得出一个基本结论：市场均衡模型并非马歇尔的那个交叉,真实的模型中至少应当包含着右下斜的供给曲线和右上斜的需求曲线。     

MEAN VARIANCE PREFERENCES, EXPECTATIONS FORMATION, AND THE DYNAMICS OF RANDOM ASSET PRICES

This paper analyzes the dynamics of an explicit random process of prices and price expectations of finitely many assets in an economy with overlapping generations of heterogeneous consumers. They maximize expected utility with respect to subjective transition probabilities defined by Markov kernels which describe the forecasting behavior of agents. Given such forecasting rules (predictors) and an exogenous process of dividends, the evolution of equilibrium asset prices and expectations is described by a random dynamical system in the sense of Arnold (1998) . The paper investigates the long-run behavior (stationary solutions) by proving the existence and stability of random fixed points for mean-variance preferences under various predictors, including unbiased predictions, and adaptive, as well as OLS forecasting. An explicit characterization of rational expectations solutions is given, providing a full dynamic characterization of asset price processes for the classical CAPM in the case of stationary OLG economies. Numerical simulations are used to compare the performance of the different predictors under an AR(1) dividend process.     

Market Participation and Share Prices

Share prices are analyzed in an overlapping generations model in which the generational size is random. This models stochastic fluctuations of market participants and can explain noninformational volatility of share prices. There exists a (stochastic) stationary equilibrium, which may be nonunique. In equilibrium, (a) the share price increases and (b) expected utility decreases with the generational size. A decline of this size below a critical level induces a crash: the stock price falls substantially, shares are undervalued, and investors' demand is restricted by illiquidity. Further, the model predicts the empirically observed positive correlation between volume of trade and absolute price changes.     

A critical evaluation of Etzioni's socioeconomic theory: Implications for the field of business ethics

Given the pervasive influence of neoclassical economic theory on the field of business, the opposition of the standard economists to the inclusion of moral factors in economic decisions provides an intellectual resistance to the ideas of many business ethicists. Etzioni (1988) offers a theoretical alternative to the neoclassical model, an alternative that includes a moral dimension. This article: (1) highlights the differences between Etzioni's proposed model and the neoclassical economic paradigm; (2) describes and critically evaluates Etzioni's proposed theory in view of his objective of synthesizing the neoclassical paradigm with a duty-based morality; and (3) discusses the implications of Etzioni's proposed paradigm for the field of business ethics.Diane Swanson is an Assistant Professor of finance and economics at Robert Morris College in Pittsburgh, Pennsylvania. She is also a doctoral student in Business Environment and Public Policy at the Katz Graduate School of Business, University of Pittsburgh.