Location, innovation and trade: The role of localization and nation-based externalities

This paper models locales that produce goods for trade outside their boundaries. We use a model that assumes monopolistic competition in both service and traded goods sectors; and, influenced by Porter (The Competitive Advantage of Nations, The Free Press, New York, 1990), we study the impact of both a localization externality and a nation-based externality. The localization externality is related to innovation that occurs because of agglomeration in the locale. The nation-based externality reflects the idea that some nations promote competitive industries more successfully than do others. We identify two types of comparative statics effects related to two distinct results of innovation.     

Spatial interactions among U.S. cities: 1900–1990

We test implications of economic geography by exploring spatial interactions among U.S. cities. We use a data set consisting of 1900–1990 metro area populations, and spatial measures including distance from the nearest larger city in a higher-tier, adjacency, and location within U.S. regions. We also date cities from their time of settlement. We find that among cities which enter the system, larger cities are more likely to locate near other cities. Moreover, older cities are more likely to have neighbors. Distance from the nearest higher-tier city is not always a significant determinant of size and growth. We find no evidence of persistent non-linear effects on urban growth of either size or distance, although distance is important for city size for some years.     

United Nations Sanctions on North Korea's Luxury Goods Imports: Impact and Implications

This article examines the impacts of UN Security Council sanctions on North Korea's banned luxury goods imports from 2004 to 2017 by investigating the bilateral trade flows between North Korea and its 71 trading partner countries. This analysis provides some evidence that the sanctions were effective only for those countries that implemented the sanctions. Overall, it is difficult to conclude that United Nations Resolution 1718, which was mainly targeted to ban luxury goods exports to North Korea, was effective in curtailing North Korea's import of luxury goods for the time period from 2006 to 2007. The article argues that the lack of a clearly defined list of luxury goods and the lack of enforcement are important reasons for the ineffectiveness of the sanctions.     

Consumer journeys: developing consumer-based strategy

Journal of the Academy of Marketing Science -     

Efficient price and capacity choices under uncertain demand: An empirical analysis

Traditional economic analyses of the peak-load problem typically assume an unrealistic degree of regularity in demand during well-defined peak and off-peak periods. This issue is addressed through a comprehensive statistical model that separates demand into its systematic and stochastic components. This model is combined with a traditional economic model and applied to local telephone service, leading to substantive conclusions relevant for managerial decisions as well as further research, among them:

? Neglecting the systematicand stochastic structure of demand may lead to inefficient tariffs. Efficient measured service structures typically price individual callsbelow incremental capacity cost.

? Industry wide capacity decision rules that are exclusively driven by blockage probability targets during narrowly defined time periods may be economically inefficient.

? For telephone service, spot pricing, which sets high prices during periods ofactual congestion, has the potential to be considerably more efficient than traditional tariffs that set high prices during periods ofexpected congestion.

     

The costs of suboptimal dynamic asset allocation: General results and applications to interest rate risk, stock volatility risk, and growth/value tilts

The recent theoretical asset allocation literature has derived optimal dynamic investment strategies in various advanced models of asset returns. But how sensitive is investor welfare to deviations from the theoretically optimal strategy? Will unsophisticated investors do almost as well as sophisticated investors? This paper develops a general theoretical framework for answering such questions and applies it to three specific models of interest rate risk, stochastic stock volatility, and mean reversion and growth/value tilts of stock portfolios. Among other things, we find that growth/value tilts are highly valuable, but the hedging of time-varying stock risk premia is less important.     

Enactment of a Sustainable Vision in the Dual Context of the Tropical Biosphere and the Developing World: A Case Study of Belize Natural Energy

Nowhere is economic, cultural, and environmental sustainability more critical than in a country like Belize, where the developing world merges with the tropical biosphere. Through a single‐organization case study design, the authors provide insight into Belize's only oil‐producing company, specifically examining its sustainability practices and its enactment of an organizational vision centered on sustainability. Our global economy relies heavily on fossil fuels; such reliance requires us to understand the sustainability efforts of these companies. Determining how sustainability is enacted in these organizations forms the basis for how these practices can be replicated. Data collection included multiple interviews with employees throughout the organization, ethnographic observation, and document analysis. The results yielded an understanding of how sustainability practices are enacted in organizational communication.     

An intelligent tutoring system for the accounting cycle: Enhancing textbook homework with artificial intelligence

This paper describes an electronic tutoring system, developed using principles of artificial intelligence (AI), to help students learn the accounting cycle. Unlike other educational technologies, the tutoring system provides instruction and feedback that is tailored to each individual student and addresses not only problem-solving outcomes but also problem-solving processes. To assess the effectiveness of the tutoring system, we administered a pre-test and then required students in a sophomore accounting course to use either the tutoring system or their textbook as a reference when journalizing transactions for a homework assignment. We then administered a post-test. A pre-post analysis showed that the tutor group’s test performance increased approximately 27% points, whereas the textbook group’s test performance improved by only 8% points. Implications of these findings for instructors and researchers are discussed.