Multiple Outlets in a Duopoly: A First Entry Paradox

The strategic advantages of being the first entrant into a market have been discussed extensively. This paper presents examples of markets in which there is no first entry advantage. Rather, the later entrant always has an advantage even when both deploy equal resources. The necessary conditions for the occurrence of this first entry paradox are presented.     

Money and prices in thirteenth-century Venice

Prices and salaries rose in Venice between 1173 and 1282. The supply of money also probably increased. Wine, grain, and commodity prices, as well as magistrates' salaries, are here collected from documentary sources to illustrate this rise in prices. Evidence from silver mining, foreign trade, banking, and diplomacy seems to demonstrate an increase in the supply of money, but price inflation (the Fisher equation, MV = PT) cannot be definitely illustrated because velocity and transaction costs cannot yet be established for medieval Venice. To clarify these prices, this study also briefly describes the coins and moneys of account used in Venice in this century.     

Within-development density and housing prices in Singapore

This paper measures how much more households pay for less density in their immediate surroundings. Using transaction and administrative data and exploiting the introduction of a regulation that restricted the number of housing units for certain land lots, we find that households discount density: a 10% increase in within-development density decreases the price per square meter by 5%. Further, the mean price per square meter of the average development increased by 1%–3% after the regulation was introduced, while the amount of built-up space remained constant. The increase in total revenue suggests developers may underestimate the externality caused by density.     

On the cultural blessings of fixed book prices

The system of fixed book prices whereby publishers set the price customers pay at the bookstore is very common in Europe and, according to the European Parliament, it is a means of unique cultural importance. For this reason, it is considered to more than outweigh any negative effects on the economic efficiency of such regulations. The main conclusion of this article, however, is that it is quite hard to find convincing evidence, either theoretical or empirical, that fixed book pricing is better, even as a cultural means, than free book pricing.     

Tactical Flexibility: Libyan Foreign Policy under Qadhafi, 1969–2004*

On September 1, 1969, a group of junior Libyan Army officers took control of the Libyan government in a bloodless coup d'état. After the coup, the group formed the Revolutionary Command Council (RCC), chaired by Muammar al‐Qadhafi. In the four decades following, Libya faced numerous foreign policy challenges. The Qadhafi regime took on a distinctly anticolonial flavor that mirrored the revolutionary political trends of Egypt under of Gamal Abdul Nasser. This change in foreign policy posture shook Libya's relations with the United States and the United Kingdom and initiated the degradation of Libyan–Western ties. Under Qadhafi's leadership, Libya chose an ideological path for that focused on the strengthening of sovereignty while pursuing policies of unity and anti‐imperialism. This often put Libya at loggerheads with the West, and at times with its neighbors. Nevertheless, Qadhafi maintained popularity among his constituency. ¹ His domestic fame was the product of a carefully constructed persona that gave him the charismatic appeal necessary to maintain leadership during the latter quarter of the twentieth century and into the new millennium. Publicly, Qadhafi highlighted the similarities between himself and Libya's rural working class. He lived in a tent, and wore modest clothing. He fancied himself a devout Muslim, and praised the wisdom of the Libyan masses. He connected with his constituency through rhetoric that illustrated the stability of his policies over time, and their connection to the ideas that originally made him popular. This argues that the source of Qadhafi's charismatic power lay in his rhetoric, which connected Libya's foreign policy decisions to his foreign policy vision, the basis of his charismatic leadership. Qadhafi articulated his foreign policy vision during his first major speech to the Libyan people in September 1969, and he referred to it time and again when speaking about major Libyan foreign policy decisions. To demonstrate, this article describes the basis of Qadhafi's leadership authority and defines the parameters of his vision. Then Qadhafi's rhetoric surrounding major shifts in Libyan foreign policy is analyzed to show its congruence with his foreign policy vision. The rhetoric surrounding the Libya–Egypt war, the end of Libya's Chad intervention, Libya's surrendering of the two Lockerbie bombing suspects to be tried under Western authority, and Qadhafi's denunciation of the weapons of mass destruction programs—all major shifts in Libyan foreign policy—demonstrate how Qadhafi was able to maintain a single message, and thus his authority, over his first 35 years in power based on values established in the early days of his revolution. The flexibility of his vision enabled Qadhafi to maintain authority, while tactically adjusting Libyan foreign policy positions.     

The double reflex of *ai in Avestan*

An earlier version of this paper was presented at the American Oriental Society's 203rd Meeting (Chapel Hill, April 1993), and I am grateful for comments from the participants there, especially William Malandra. Mark Hale, Stanley Insler, Stephanie Jamison, P. Oktor Skjærvø, and Calvert Watkins all deserve special thanks for contributing much time and advice. The research for this paper was made possible by a grant from the National Science Foundation.     

ZONE PRICING*

ABSTRACT. Our purpose is to study a spatial price policy often encountered in the real world, known as zone pricing. This price policy consists in determining simultaneously several delivered prices together with the geographical zones in which they apply. It is shown that zone pricing approximates perfect spatial price discrimination and that the firm's profit increases with the number of zones. Furthermore, the number of markets supplied by the firm rises with the number of zones. Finally, zone pricing is compared to other standard spatial price policies and possible extensions are discussed.     

FRIENDSHIP NETWORKS*

ABSTRACT This paper develops a model of social networks different from those presented in the recent literature. In contrast to existing models, the level of investment in link formation is a continuous decision variable, and links form stochastically rather than deterministically, with the probability depending on the noncooperative investment choices of both parties. Since the network structure is then stochastic rather than deterministic, the actual pattern of links cannot be specified, as in previous models, with the analysis focusing instead on which links are most likely to form. This alternate approach leads to a much simpler mathematical structure than in previous work. The analysis, which is couched in the context of friendship networks, shows that individual investment in friendship formation is too low. In addition, the analysis shows that, in an asymmetric setting where one individual has personal magnetism or a broad group of acquaintances, friendship links involving this attractive agent are most likely to form.     

QUANTITATIVE GEOGRAPHY*

ABSTRACT This paper provides an overview of quantitative geography. In addition to discussing what quantitative geography is, the paper details the methods that have come to define it. Six broad categories are used to discuss the range of methods found in quantitative geography: geographic information systems; airborne sensing (global positioning system, photogrammetry, and remote sensing); statistics and exploratory spatial data analysis; mathematics and optimization; regional analysis; and computer science and simulation. Particular emphasis is given to the state of the art in each area and the contributions of geographers, with associated discussion on major unresolved issues and future research directions.     

Epilepsia Verminosa*

Epilepsy is a major public health threat in the developing world, with much higher prevalence and incidence rates than those observed in developed countries. At present, one of the most common causes for epilepsy worldwide is the parasitic worm, Taenia solium, and the associated neurocysticercosis (NCC) that may often result from this infestation. Worm infestation was already recognized as a cause of epilepsy by the middle of the 18th century. Helminths and their effects on health were a daily medical concern in the 18th and 19th centuries with prevailing views ranging from the beneficial effects of the presence of adult worms in the gut, to considering them as culprits for a wide variety of diseases. A number of cases followed longitudinally by various nineteenth-century French physicians showed that there was good reason to believe that the verminous influence on seizures was real, as the expulsion of the T. solium often coincided with a notable amelioration of symptoms. Several theories were proposed to account for how the worms could lead to Epilepsia nervosa, including notions of competition for nutritional resources between the host and the parasite, and irritation of the medulla and of peripheral nerve endings predisposing to epileptiform episodes. Recently, after almost a century of quiet, interest in the neurological effects of helminths has been rekindled, due in part to the growing number of cases in the United States with NCC-related neurological disorders. In this article, we review the history of our understanding of the relationship between seizure disorders and parasitic worms, and we relate this history to contemporary epidemiologic and public health issues in developing countries.