Applied Spatial Econometrics: Raising the Bar

Abstract

This paper places the key issues and implications of the new ‘introductory’ book on spatial econometrics by James LeSage & Kelley Pace (2009) in a broader perspective: the argument in favour of the spatial Durbin model, the use of indirect effects as a more valid basis for testing whether spatial spillovers are significant, the use of Bayesian posterior model probabilities to determine which spatial weights matrix best describes the data, and the book's contribution to the literature on spatio-temporal models. The main conclusion is that the state of the art of applied spatial econometrics has taken a step change with the publication of this book.

Relever le niveau de l'économetrie spatial appliquée

RÉSUMÉ La présente communication place les principales questions et implications du nouvel ouvrage d'introduction sur l'économétries spatiale de James LeSage & Kelley Pace (2009) dans un contexte plus général: l'argument favorisant le modèle spatial de Durbin, l'emploi d'effets indirects comme base plus valable pour évaluer l'aspect significatif des déversements spatiaux, l'emploi des probabilités d'un modèle baysien postérieur pour évaluer laquelle des matrices de poids spatiaux décrit le mieux les donnes, et la contribution de l'ouvrage la documentation sur les modèles spatio-temporels. La principale conclusion est qu'avec la publication de cet ouvrage, l'état de l'art de l'économétries spatiale applique a effectué un grand pas en avant.

Alzar el nivel de la econometría espacial aplicada

RÉSUMÉ Este trabajo plantea las cuestiones e implicaciones clave del nuevo libro introductorio sobre económetra espacial de James LeSage & Kelley Pace (2009) dentro de una perspectiva más amplia: el argumento a favor del modelo espacial Durbin, el uso de efectos indirectos como una base más válida para poner a prueba si los desbordamientos espaciales son significativos, el uso de probabilidades posteriores bayesianas para descubrir que matriz de pesos espaciales describe mejor los datos, y la contribución del libro a la bibliógrafa sobre modelos espaciotemporales. La principal conclusión es que la econometría espacial aplicada más avanzada ha experimentado un cambio radical con la publicación de este libro.

     

The Impact of the EU–US Open Skies Agreement and the Resulting British Airway's Open Skies Initiative: Passenger Numbers in London,Amsterdam and Paris

Abstract

The advent of the EU–US Open Skies Agreement has been widely anticipated. A number of consequences have been predicted, for example, impacts on fares, passenger volumes, choice and consumer welfare. Airline costs are also predicted to fall as a result of increased competitiveness and increased cooperation among airlines. For the short period since the implementation of the Agreement, it is relatively easy to assess the supply-side changes that have been made, but more difficult to make wider judgements. This paper indicates the data that will be required to make these judgements and notes some methodological difficulties. Early estimates of the impact on passenger numbers are given using time series analysis focusing on London airports, in particular London Heathrow and airports served by British Airway's Open Skies Airline from Paris Orly and Amsterdam Schipol.

Impact de l'accord Ciel Ouvert entre l'UE et les États-Unis et de l'initiative Open Skies résultante de British Airways: nombre de passagers à Londres, Amsterdam et Paris

Résumé L'avènement de l'accord Ciel ouvert entre l'UE et les États-Unis avait été très largement prévu, et on a prédit un certain nombre de conséquences, notamment l'impact sur le prix des billets, sur les volumes de passagers, sur le choix pour les consommateurs et sur leur bien-être, entre autres. On prévoit également que les coûts des compagnies d'aviation devraient baisser, en conséquence de l'augmentation non seulement de la compétitivité, mais aussi de la concurrence entre les compagnies. A l'issue de la courte période qui s'est écoulée depuis l'implémentation de l'Accord, il est relativement aisé d’évaluer les variations qui se sont produites du côté de l'offre, mais beaucoup plus difficile de formuler des opinions plus générales. La présente communication indique les données qui seront requises pour formuler ces jugements, et souligne certaines difficultés sur le plan de la méthodologie. Des premières évaluations de l'impact sur le nombre de voyageurs ont été avancées, sur la base d'analyses à série temporelle concentrées sur les aéroports de Londres, notamment l'aéroport Heathrow de Londres et les aéroports desservis par la compagnie Open Skies de British Airway entre Paris Orly et l'aéroport Schipol d'Amsterdam.

El efecto del Acuerdo de Cielos abiertos entre la UE y EE.UU. y el resultado de la Iniciativa de Cielos abiertos de British Airways: número de pasajeros en Londres, Ámsterdam y París

Resumen El advenimiento del Acuerdo de Cielos abiertos entre la EU y EE.UU. era algo ampliamente esperado. Se han pronosticado muchas consecuencias, por ejemplo, los efectos sobre las tarifas, los volúmenes de pasajeros, las opciones y el bienestar de los consumidores. También se ha pronosticado la caída de los costes de las aerolíneas debido a una mayor competitividad y el incremento de la cooperación entre las aerolíneas. En el corto periodo de implantación del Acuerdo, es relativamente fácil evaluar los cambios que se han dado en el lado de la oferta, sin embargo, es más difícil realizar estimaciones mayores. Este trabajo indica que se necesitan datos para realizar estas estimaciones y hace referencia a algunas dificultades metodológicas. Los primeros estimativos del efecto sobre los números de pasajeros se han obtenido mediante análisis de series de tiempo centrados en los aeropuertos de Londres, en particular, el de Heathrow, y en los aeropuertos atendidos por la Aerolínea de Cielos abiertos de British Airways de Orly, en París, y Schipol, en Ámsterdam.

     

Modelling Intercontinental Tourism Consumption in South Africa: A Systems‐of‐Equations Approach

This paper investigates the pattern of inbound tourists' consumption in South Africa, examining four main intercontinental markets and five different tourism goods. The empirical investigation develops an almost ideal demand system (AIDS) model and it extends recent research by allowing tourists to base their spending decision on the real effective price differences between South Africa and their home country. The results show that tourist spending in South Africa is a luxury good, and tourists react normally to a change in the relative price of goods. The cross‐price elasticities suggest that the preferences of different markets influence their view of substitutability and complementary effects between various products in South Africa.     

We Used to Get and Give a Lot of Help: Networking,Cooperation and Knowledge Flow in the Hunter Valley Wine Cluster

The Hunter Valley, New South Wales, is both Australia's oldest continually producing wine region and a highly functioning wine business cluster. New generation cluster actors perceive that the region's concentration of historic family‐based firms has contributed to its strength. We have used rarely consulted and newly accessioned evidence from the 1820s to the 1920s to qualitatively test the extent to which early networking created pathways for knowledge flow in the region. Our cross‐disciplinary research into the historic depth of embedded cooperation reveals a little known feature of early Australian business history and complements the more commonplace breadth approach in cluster studies.     

A critical evaluation of alternative methods and paradigms for conducting mediation analysis in operations management research

Mediation as a theory testing approach has witnessed considerable adoption among Operations Management (OM) researchers. Although mediation-testing methods have evolved tremendously in the past decade, their dissemination in the OM field has not seen parallel growth. These advanced techniques facilitate the testing of existing and complex hypotheses in a more precise manner. With the intent of critically evaluating existing and alternative methods for conducting mediation analysis needed to support sophisticated empirical research, this paper first reviews OM studies that tested for mediation in the past eleven years (2002–2012) from top-tier OM journals. Four commonly used mediation approaches were identified. Based on principles of good theory building, type of mediation model, and properties of empirical data, we evaluate the existing methodologies and make recommendations on how to improve the rigor of OM mediation testing. Using published OM studies in top journals as examples, we then illustrate the relevance and advantages of these recommendations, as well as their ease of use. Furthermore, we empirically show that more robust and insightful results can be achieved by adopting these techniques, which in turn have the promise of leading to better theory building and testing in the field of operations management.     

Combining forecasts: An application to elections

We summarize the literature on the effectiveness of combining forecasts by assessing the conditions under which combining is most valuable. Using data on the six US presidential elections from 1992 to 2012, we report the reductions in error obtained by averaging forecasts within and across four election forecasting methods: poll projections, expert judgment, quantitative models, and the Iowa Electronic Markets. Across the six elections, the resulting combined forecasts were more accurate than any individual component method, on average. The gains in accuracy from combining increased with the numbers of forecasts used, especially when these forecasts were based on different methods and different data, and in situations involving high levels of uncertainty. Such combining yielded error reductions of between 16% and 59%, compared to the average errors of the individual forecasts. This improvement is substantially greater than the 12% reduction in error that had been reported previously for combining forecasts.     

Policy-driven ecosystems for new vaccine development

This paper examines the relationship between biomedical policies and entrepreneurial R&D strategies. Public health programs have been unable to provide effective and affordable treatment of infectious diseases for the poor. While governments have become more open to private sector contributions to policy objectives, it is rare to find new ventures commercializing healthcare innovations for neglected diseases. Two case studies of entrepreneurial ventures, in the UK and China, provide evidence on how resource-constrained firms mobilize participants in policy-specific ecosystems to achieve their goals of new vaccine development for tuberculosis. Ecosystem analysis reveals how the innovators’ business models can align their strategies with national policy objectives.     

Was the Internet the Only Option? Which Way Should Business and Information Systems Engineering Go?

In global competition, the Internet turned out to be the single and hegemonial infrastructure for communication. It has become the “nervous system” of today’s networked economy. While the first phase provided communication services, like e-mail, the WWW has established an interactive platform to allow easy access to advanced services. Now, in its “third” or cooperative phase, the Internet will finally lead to a ubiquitous informatization where business processes and applications become interleaved beyond the boundaries of enterprises. For this phase, many analogies to the emergence of the Internet can be observed.