The relative interior of the base polyhedron and the core

Summary. This note provides two necessary and sufficient conditions for the relative interior of the core (and the base polyhedron) to be non-empty: (i) the second largest excess of the prenucleolus is negative; (ii) the grand coalition's payoff is greater than the minimum no-blocking payoff. Such conditions imply an intuitive method in proving core existence, they also imply results on the sensitivity of the base polyhedron and the core. Received: June 25, 1999; revised version: May 8, 2000     

Invention in the Face of Necessity: Marshallian Rhetoric and the Giffen Good(s)

Alfred Marshall's introduction of the 'Giffen Good' case appears puzzling, if only because it was not discussed by Robert Giffen. This article suggests that the analytical framework which Marshall used to discuss the case owed a good deal to the work of W.S. Jevons. The precise argument, however, was introduced as a rhetorical device to defend the notion of consumer surplus (against J.S. Nicholson) and to criticize the advocacy of tariff reform (by W.A.S. Hewins).     

The evolving patterns of competition after deregulation: the relevance of institutional and operational factors as determinants of rivalry

In this research, we apply an ecological model of competition to analyze the effect of deregulation on within industry competitive patterns. Particularly, we identify organizational forms within the population according to two different perspectives: an operational one and an institutional one. We argue that deregulation influences the relative importance of each of these dimensions at determining the set of firms that can be considered direct competitors, and the intensity with which they compete. Our findings show that the use of these two perspectives is of utmost importance to understand the evolution of competition in contexts where deregulation takes place. As our arguments predict, we show that, during the regulated period, competition was based on institutional definitions of organizational forms. However, after deregulation, competition progressively focused on operational definitions of organizational form. Our findings confirm the relevance of deregulation at shaping competitive interdependences within an industry.     

The concept of heterogeneity and change among the Mandenka

The Mandenka of West Africa see the universe as having evolved according to a principle of heterogeneity. Heterogeneity is seen as mutually beneficial and generative of symbiosis. On the other hand, homogeneity is considered as source of competition and conflict.Individuals differ, and heterogeneity is amplified by interaction between elements. Life develops as a process of incessant change. Each age group is assigned to certain tasks in the community. As the individual goes through several phases of his life, he acquires the ability to see things from different points of view. He also learns to see himself from the point of view of others through formalized channels of “joking relations” that serve as social feedback loops.Westernization is seen as having two basic disadvantages: Its homogenistic philosophy of “unity by similarity” is fallacious because homogeneity creates conflicts, and the principle of specialization brought about by westernization will lock each person into one task and makes him incapable of seeing situations from another person's point of view, accompanied by the homogenistic misconceptions that all persons have the same thought structure.     

The dynamics of environmentalism and the environment

We study the relationship between environmental preferences and the environment. Preferences are transmitted intergenerationally and through social interactions, where we assume that agents are more likely to adopt environmental preferences the larger the amount of pollution. In the basic setting we find that both converge non-monotonically towards an interior steady state. When including technical change we notice that there will be no change in the steady state level of the environment unless technical change is sufficiently strong, which stands in stark contrast to the literature. Upon introducing environmental laws we find that these may lead to a virtually pollution-free environment. This happens if environmental laws are implemented when public support is strong enough.     

The concept of maturity and the transformation of economic systems

In economics, ‘maturity’ essentially means that an economic system (or part of a system) is ripe to be transformed into something else or heading towards decline. In Josef Steindl's economic thinking the concept of maturity, by which he means a stage of development where the economy becomes unable to fully realize its output potential, occupies a central place. Whereas for Steindl the main causes of such maturity are endogenous, other economists such as Schumpeter, Sombart, Hilferding, Keynes, and Hansen consider stagnation to be caused primarily by exogenous factors. Various concepts and causes of maturity are compared. Contrary to expectations based on these concepts, economic development after the Great Depression has not been characterized by stagnation or transition to planned economy. Instead, the dynamics of innovation were strong enough to prevent the economy from becoming ‘mature’. It appears that the actual course of events can be better explained within Steindl's concept of maturity.     

The relevance and relative robustness of sources of inflation bias in Pakistan

We empirically examine the relevance and relative robustness of stabilization and non-stabilization sources of inflation bias for the typical discretionary monetary policy strategy of Pakistan. First, the stabilization and non-stabilization sources of inflation bias are identified, and their proxy variables are constructed. Second, a robustness evaluation strategy is developed based on bivariate and multivariate analysis of cointegrating relationships among inflation bias indicators and potential sources thereof to determine their long-term relevance and relative robustness or fragility. The stabilization sources of inflation bias such as exploitation of the inflation output trade-off for growth stimulation and the central bank’s preference for growth stabilization are the most relevant and relatively robust sources of inflation bias vis-à-vis the non-stabilization sources. Among the non-stabilization sources, only openness is partially relevant but is fragile.     

The dynamics of open-market operations and the assignment problem

The purpose of this paper is to examine the implications of expansionary monetary policy financed by open-market purchases and to reconsider the assignment problem. We present a strict definition of open-market operations: a swap of money against bonds is achieved by just buying or selling bonds in the open market all through the adjustment process. Under this definition the open-market paradox given by Blinder and Solow is avoided. Even in the case of zero capital mobility, the assignment problem has an important economic meaning.     

The growth dynamics of the Internet and the long wave theory

The phenomenal growth of Internet users is slowing down and we expect to approach a world limit in the next decade of about 14% of the world population. On the basis of a historical analysis this basic innovation is placed in the context of the Kondratieff cycles (K-waves) and the associated Generational-Learning model. A quantitative analysis using logistic growth curves allows us to evaluate its growth dynamics and to assert that the Internet is coming to the end of the 4th K-wave downswing or innovation structural phase and will then embark on the 5th K-wave upswing or consolidation structural phase. The debate about the future of the K-wave pattern is considered, specifically the factors bearing on the continuation or alteration of the pattern and the trajectory.     

The dynamics of inequality and social security in general equilibrium

This paper analyzes the dynamic politico-economic equilibrium of a model where repeated voting on social security and the evolution of household characteristics in general equilibrium are mutually affected over time. In particular, we incorporate within-cohort heterogeneity in a two-period Overlapping-Generation model to capture the intra-generational redistributive effect of social security transfers. Political decision-making is represented by a probabilistic voting à la Lindbeck and Weibull (1987). We analytically characterize the Markov perfect equilibrium, in which social security tax rates are shown to be increasing in wealth inequality. A dynamic interaction between inequality and social security leads to larger social security programs. In a model calibrated to the U.S. economy, the dynamic interaction is shown to be quantitatively important: It accounts for more than half of the social security growth in the dynamics. We also perform some normative analysis, showing that the politico-economic equilibrium outcomes can be fundamentally different from the Ramsey allocation.     

Property as an economic concept: reconciling legal and economic conceptions of property rights in a Coasean framework

Adopting a simplistic view of Coase (J Law Econ 3:1–44, 1960), most economic analyses of property rights disregard both the key advantage that legal property rights (that is, in rem rights) provide to rightholders in terms of enhanced enforcement, and the difficulties they pose to acquirers in terms of information asymmetry about legal title. Consequently, these analyses tend to overstate the role of “private ordering” and disregard the two key elements of property law: first, the essential conflict between property (that is, in rem) enforcement and transaction costs; and, second, the institutional solutions created to overcome it, mainly contractual registries capable of making truly impersonal (that is, asset-based) trade viable when previous relevant transactions on the same assets are not verifiable by judges. This paper fills this gap by reinterpreting both elements within the Coasean framework and thus redrawing the institutional foundations of both property and corporate contracting.     

The semiconductor silicon industry roadmap: Epochs driven by the dynamics between disruptive technologies and core competencies

The resource-based perspective has done much to identify idiosyncratic firm attributes that may be a principal source of competitive advantages. Unfortunately, there has been little systematic industry evidence to support the strategic importance of core competence, nor has there been much work on the temporal or cumulative nature of core capabilities within an industrial setting. Further, little or no research has been performed demonstrating how the advent of technological discontinuities or disruptive technologies plays a part in creating epochs in technology competency development and the roadmap of an industry. In this study, we analyze the evolutionary and cumulative nature of core capabilities and their interactions with technological discontinuities from a market-driven perspective. We have studied the evolution of 167 firms through the 50-year history of the semiconductor silicon industry. Over time, there were several structural shifts in the necessary competencies through the advent of disruptive technologies. In the last 30 years, however, the change in the required competencies has been more cumulative in nature. We summarize this in a roadmap detailing the epochs in the semiconductor silicon industry.     

The origins of the concept of ‘foresight’ in science and technology: An insider's perspective

This article explores how the term ‘foresight’ originally came to be used in connection with science and technology by the author and SPRU colleagues in 1983. It analyses how the rationale for its use evolved over time, first providing a ‘catchy’ title for a study (‘Project Foresight’), and then a convenient shorthand for the focus of that study, before eventually coming to formally signify a new approach to looking systematically into the future of science and technology, an inclusive and wide-ranging process that differed appreciably from that of traditional ‘technology forecasting’. The paper reflects on the importance of concepts and terminology in the field of science policy research, providing examples of how an inappropriate term or phrase can damn the prospects of the research having an impact on policy, while a more politically astute use of terminology can greatly enhance the probability of making a significant impact. The paper also examines other early uses of the concept of ‘foresight’ in the United States and Canada at about the same time. In addition, it highlights the conceptual similarities between foresight and la prospective, a novel approach developed in France not just for looking into the future but also for shaping or even ‘constructing’ the future of our choice, an ambitious aspiration that it shares with foresight. This case-study on the origins and early evolution of ‘technology foresight’ illustrates the essential importance of terminology in differentiating key concepts in social sciences (where it sometimes gives rise to unfortunate priority disputes), and particularly in the case of policy research.     

The dynamics of parallel economies. Measuring the informal sector in Mexico

The existence of parallel economies that operate in the shadows of informality within most Latin American countries is widely recognized by the economic literature. However, its composition, size and effects on economic growth are still open questions. In this paper, we estimate the size and the evolution of the Mexican informal economy in the last three decades using a vector error correction model. In addition to the standard explanatory variables traditionally used in the currency demand approach, we include remittances given their relevance in the Mexican economic system. The results indicate that informality prior to the late 1980s accounted for at least two thirds of GDP, while stabilizing around one third of GDP in the last decade. Furthermore, our estimates provide evidence of a positive long-run relationship between informality and economic growth.     

Co-evolutionary dynamics in strategic alliances: The influence of the industry lifecycle

This article examines the application of co-evolutionary theory to the way in which firms form, perform, compete and change within alliance relationships over the period of the industry life cycle. This extends the work of Volberda and Lewin who extensively critiqued the use of single-theme explanations for explaining the adaption and selection of firms. Delineating the aspects of change (adaptation) and selection, and using case material from different stages of the Industry life cycle, we propose that co-evolution is a better explanator of strategic alliance and industry dynamics at early and late stages of the cycle, whilst evolution and survival of the fittest is more useful in the middle stages.