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The concept of base-multiplier analysis is that export activities constitute the economic base of a region, whereas the other economic activities that sell their goods and services to the local residents grow or shrink depending on the... more
The concept of base-multiplier analysis is that export activities constitute the economic base of a region, whereas the other economic activities that sell their goods and services to the local residents grow or shrink depending on the performance of the base activities. These concepts, with origins extending at least as far back as the early 1900s, have reached maturity and are widely applied. The attractiveness of an economic base model (EBM) draws in its simplicity in expressing the power of demand in regional income determination. Extensive literature has grown up around the economic base theory, however, systematic publications concerning empirical application are scarce and focus mostly on the socioeconomic dimension of the analyzed system. Such territorially oriented economic models are useful in a variety of decision making procedures; preparation of annual budgets, short-run market demand forecasting, longer-term growth strategies. The purpose of this article is to present a practical application of EBM to the geographical area of the Guadiana Estuary, on the south coast of Portugal. The interest of the EBM application in this case study includes its integration in a broader project that applies a Systems Approach Framework (SAF) towards Integrated Coastal Zone Management (ICZM). There are three pillars of sustainability considered here: social, ecological and economic, hence, the article not only describes EBM application but also how it has been use to demonstrate a chain of events resulting from the interaction between the ecological and the socioeconomic sub systems of the area. The results obtained will probably raise the usual criticism to which the economic base model has been exposed previously; however it provides unequivocal evidence that a truly interdisciplinary approach to a given territorial target can be successfully shared with end users and the research community.
We purpose a mixed-mode survey to sample special purpose tourists. The mode includes on-site and off-site samples of a small population of bird watchers. We explore online social networks to get in touch with the target population. We... more
We purpose a mixed-mode survey to sample special purpose tourists. The mode includes on-site and off-site samples of a small population of bird watchers. We explore online social networks to get in touch with the target population. We obtained convergent validity of the samples in terms of elicited preferences. The approach is useful for studies targeting small and socially cohesive populations. a b s t r a c t This paper reports findings derived from a study of birdwatchers in the Azores. The subject was bird-watchers' preferences for given management actions designed to improve the attractiveness of bird watching sites. In the absence of official statistics on this market segment, use was made of a mixed-mode survey incorporating both on-site and off-site surveys and the use of on-line social networks and communications tools. The variable willingness-to-stay more time at the site was used as a welfare measure. It has the advantage that it can be used to demonstrate the significant returns of eco-tourism to local communities. Two findings emerge. First, tourists practicing wildlife viewing and nature-based activities are less worried about infrastructures and care more about biodiversity and habitat quality, and second, the research technique appears to be successful when surveying seasonal recreation communities that are small and socially cohesive.
Estuaries belong to the most biologically productive ecosystems of our planet, and do offer countless ecosystem services which are relying on the scenic beauty and on overall environmental quality. Their multipurpose attractiveness... more
Estuaries belong to the most biologically productive ecosystems of our planet, and do offer countless ecosystem services which are relying on the scenic beauty and on overall environmental quality. Their multipurpose attractiveness explains the ever evolving process of occupation by humans. In Guadiana estuary which is the terminal segment of a 730 km long river the ecosystem services are shared by Portugal and Spain. The economic development pursued by both countries in the river catchment creates rising pressures mainly on water resources. At the moment there are more than 100 dams, 1.9 million people and 300,000 hectares of irrigated areas along the basin. This paper reports the first application of Contingent Valuation Method to the assessment of public sensibility and preferences with respect to the improvement of water quality in Guadiana Estuary. The survey was carried out at both margins of the river. Data analysis includes the use of a two steps model; in the first step voting behavior is analyzed using logistic regression while in the second step, bid decision is examined using Generalized Additive Models (GAM). The results demonstrate strong public support for the improvement of water quality and identified the key determinants of this attitude. In addition, survey evidences demonstrate that the estuary is regarded as a common and share resource hence, any action plan should be guided in this integrated direction. This analysis is part of the System Approach Framework tested and developed within SPICOSA project, financed by EU's Sixth Framework Programme. Results will be integrated in a decision support system concerning different strategies related to water quality improvement in the Estuary. M.H. Guimarães () · T. Dentinho
A Choice Modeling (CM) study was chosen to assess specific management actions related to bird-watching on the Portuguese island of Terceira in the Azores. The usual willingness-to-pay measure was replaced by the willingness-to-stay (WTS)... more
A Choice Modeling (CM) study was chosen to assess specific management actions related to bird-watching on the Portuguese island of Terceira in the Azores. The usual willingness-to-pay measure was replaced by the willingness-to-stay (WTS) longer on the island for bird-watching, given changes in the site attributes. Results of the valuation study were presented to stakeholders and policy-makers using an innovative method. In particular , CM results were incorporated into a modeling tool which simulated the impact of alternative policy packages. For each selected scenario, users were able to understand birders' WTS and its impact on the local economy. The tool provided a fast and clear way of communicating relevant information, resulting in a more informed and inclusive deliberative process. Furthermore, we were able to see how results were used by the final users and came to the conclusion that local managers had preconceived ideas which did not match birders' preferences. This work led to a shift regarding prior beliefs about the relevance of bird-watching activities on the local economy as well as management actions likely to promote it. The underlying participatory approach was found to be an essential feature for the success of this science and policy interaction.
Science and policy integration towards natural resource management is not novel; however it has not always been successful. Partially, this failure is explained by the lack of consideration of different forms of knowledge. In order to... more
Science and policy integration towards natural resource management is not novel; however it has not always been successful. Partially, this failure is explained by the lack of consideration of different forms of knowledge. In order to incorporate the diversity of knowledge, transdisciplinary has been proposed and, this paper tests conceptual modeling as a tool to promote it. Qualitative modeling is an intermediate step of Systems Approach Framework (SAF) that is a methodology towards the sustainability of social-ecological systems. SAF has been applied in Praia da Vitoria Bay, in the Azores to analyze the future use of wetlands. We promoted a workshop bringing together 18 stakeholders: scientists, managers, private sectors and Non-Governmental Organizations. This paper presents the procedures and discusses the observed interaction between participants, their views and, how the wetlands services were described. Results show that non-scientists found the exercise particularly challenging but with high value due to: the systemic view and, opportunity of sharing viewpoints. The wetlands were mostly described by the direct benefits. The results show that transdisciplinarity can be operationalized and that conceptual modeling is an adequate exercise to achieve it. However, interdisciplinary work and stakeholders' analysis are also necessary because the knowledge gathered is different.
O sistema de abastecimento de água da cidade do Huambo está bastante degradado em virtude da guerra civil que vitimou Angola durante trinta anos. O objectivo do artigo é determinar a vontade de pagar dos habitantes do Huambo para... more
O sistema de abastecimento de água da cidade do Huambo está bastante degradado em virtude da guerra civil que vitimou Angola durante trinta anos. O objectivo do artigo é determinar a vontade de pagar dos habitantes do Huambo para avaliação a capacidade económica de melhora o sistema de abastecimento de água da cidade. Para isso adoptou-se o método de avaliação contingente e entrevistaram-se trezentas famílias dos diferentes bairros da cidade do Huambo. Seguidamente determinou-se a curva da procura de abastecimento de água da população do Huambo e estimou-se a receita e número de excluídos para diferentes níveis de política preços. Abstract Abstract Abstract Abstract Abstract The water supply system of the City of Huambo is severely degraded due to thirty years of civil war in Angola. The objective of this article is to estimate the willingness to pay of the Huambo residents for the improvement of the water supply system of the city. To achieve that it is used the contingent valuatio...
2 SUHVHQWH DUWLJR SUHWHQGH DYDOLDU D LQflXrQFLD GRV aeroportos no desenvolvimento das diferentes ilhas dos Açores. Para isso assume-se que a evolução da população é uma boa variável proxi para estimar a evolução económica das ilhas e... more
2 SUHVHQWH DUWLJR SUHWHQGH DYDOLDU D LQflXrQFLD GRV aeroportos no desenvolvimento das diferentes ilhas dos Açores. Para isso assume-se que a evolução da população é uma boa variável proxi para estimar a evolução económica das ilhas e testam-se várias variáveis ...
Nos Açores a produção de beterraba sacarina com fim industrial é exclusiva da ilha de S. Miguel onde, ao longo do último século, tem ocupado áreas com altitude até 300 metros e declives inferiores a 7%. A área variou entre 3000 hectares... more
Nos Açores a produção de beterraba sacarina com fim industrial é exclusiva da ilha de S. Miguel onde, ao longo do último século, tem ocupado áreas com altitude até 300 metros e declives inferiores a 7%. A área variou entre 3000 hectares na década de sessenta e 200 ...
The value of recreational snorkelling in defined underwater routes was evaluated for Marinha Beach, Algarve. The travel cost technique was used for defining the value of recreational use and the benefits of this natural resource. A total... more
The value of recreational snorkelling in defined underwater routes was evaluated for Marinha Beach, Algarve. The travel cost technique was used for defining the value of recreational use and the benefits of this natural resource. A total of 115 questionnaires were analysed, based on surveys carried out from the 15 of July to 15 of September 2008. Regression analysis used considered the number of dives as the independent variable, while dependent variables referred to different costs incurred during the trip and time spent on the activity weighted by a fraction of the declared income. The estimated average surplus per dive was 5€ and the value of the three routes was of 600€/year, corresponding to a total of 30000€, considering a discount rate of 2% and the maintenance of the resource for several years. Assuming a carrying capacity of 1000 dives per year, the total resource rent per year was estimated at 5000€, corresponding to a total economic value for the use of these underwater r...
The value of recreational snorkelling in defined underwater routes was evaluated for Marinha Beach, Algarve. The travel cost technique was used for defining the value of recreational use and the benefits of this natural resource. A total... more
The value of recreational snorkelling in defined underwater routes was evaluated for Marinha Beach, Algarve. The travel cost technique was used for defining the value of recreational use and the benefits of this natural resource. A total of 115 questionnaires were analysed, based on surveys carried out from the 15 of July to 15 of September 2008. Regression analysis used considered the number of dives as the independent variable, while dependent variables referred to different costs incurred during the trip and time spent on the activity weighted by a fraction of the declared income. The estimated average surplus per dive was 5€ and the value of the three routes was of 600€/year, corresponding to a total of 30000€, considering a discount rate of 2% and the maintenance of the resource for several years. Assuming a carrying capacity of 1000 dives per year, the total resource rent per year was estimated at 5000€, corresponding to a total economic value for the use of these underwater r...
The paper starts with the introduction of a simple analytical tool that classifies regions according to their scale and accessibility. Those indicators are closely related to the strategies of European expansion and European integration... more
The paper starts with the introduction of a simple analytical tool that classifies regions according to their scale and accessibility. Those indicators are closely related to the strategies of European expansion and European integration and at the same time translate paradigmatic outcomes of those combined strategies; they are usually labelled as fortress Europe, different speeds Europe, coloniser Europe and, adding
The aim of this paper is to analyze the impacts of electric mobility in the transportation patterns using a spatial interaction model, with alternative transportation modes and implicit accessibility networks. Beyond the introduction, the... more
The aim of this paper is to analyze the impacts of electric mobility in the transportation patterns using a spatial interaction model, with alternative transportation modes and implicit accessibility networks. Beyond the introduction, the paper is divided into three parts: a) In the first part we design the spatial interaction model for the islands with alternative modes of transportation and implicit accessibility networks; b) In the second part we estimate the prospective demand for electric mobility based on data from a choice experiment; c) in the third part we try to understand the impacts of the attributes of electric mobility in the transportation patterns of the Azores.
Research Interests:
Angra do Heroísmo (Terceira; Islas Azores, Portugal) es una ciudad pequeña, insular y periférica, lo que hace que sea una ciudad más expuesta a los problemas de insostenibilidad urbana. El objetivo principal de este estudio es definir los... more
Angra do Heroísmo (Terceira; Islas Azores, Portugal) es una ciudad pequeña, insular y periférica, lo que hace que sea una ciudad más expuesta a los problemas de insostenibilidad urbana. El objetivo principal de este estudio es definir los problemas de Angra do Heroísmo con base a las perspectivas de los ciudadanos en lo que se refiere a sostenibilidad urbana con la finalidad de mejorar la calidad de vida y marcar las directrices adecuadas de progreso y crecimiento. Para desarrollar el trabajo se utilizó la Metodología Q, que consta de cuatro fases: 1º - Concurse; 2º - Q-Sample; 3º - Q-Sort y 4º - ConclusionConclusión. Los indicadores cualitativos que fueron definidos en el Concurse fueron: Urbanismo; Desarrollo; Equipamientos y Seguridad; Economía; Gobierno y Financiación; Migración; Pobreza; Cultura y Educación; Ambiente; y Participación pública. Los stakeholders seleccionados incluían un número equilibrado de Ciudadanos, Comerciantes, Funcionários del Municipio, Académicos y Activ...
Huambo province in Angola has been detached from the outside world since the begining of the nineties. First due to the civil war in Angola and from then on due to the degradation of the roads and destruction of the railways. Furthermore... more
Huambo province in Angola has been detached from the outside world since the begining of the nineties. First due to the civil war in Angola and from then on due to the degradation of the roads and destruction of the railways. Furthermore there is the lack of integration of the province itself due to transport difficulties and human desertification. The
Climate change becomes an increasing constraint in IWRM and many effects are expected in coastal watersheds like sea level rise and its consequences (i.e. beach erosion, salt water intrusion, soil salinization, groundwater and surface... more
Climate change becomes an increasing constraint in IWRM and many effects are expected in coastal watersheds like sea level rise and its consequences (i.e. beach erosion, salt water intrusion, soil salinization, groundwater and surface water pollution...) or water budget changes (i.e. seasonal and inter-annual fluctuations) and an increase of extreme events (i.e. floods, rainfalls and droughts). Beside this physical changes
ABSTRACT This paper tries to understand urban unsustainability. The main argument is that the story of unsustainable cities is characterized by a ‘tragedy of the commons’ phenomenon not only in the deployment of urban infrastructure but... more
ABSTRACT This paper tries to understand urban unsustainability. The main argument is that the story of unsustainable cities is characterized by a ‘tragedy of the commons’ phenomenon not only in the deployment of urban infrastructure but also in the overuse of the natural capital that sustain the city. We show that, looking at the story of unsustainable cities from the perspective of a simple general equilibrium urban model, open access to urban land leads to high concentrations of population, huge deployment of urban infrastructure and irreversible degradation of the natural capital creating a ‘tragedy of urban infrastructure’ that undermines the sustainability of cities creating preannounced urban ruins.Resumen. Este artículo intenta entender la insostenibilidad urbana. El argumento principal es que la historia de las ciudades insostenibles está caracterizada por el fenómeno de la “tragedia de los comunes” no solo en el despliegue de infraestructura urbana sino también en la sobreexplotación del capital natural que sostiene la ciudad. Mostramos que, observando la historia de ciudades insostenibles desde la perspectiva de un modelo urbano de equilibrio general simple, el acceso libre al suelo urbano causa concentraciones de población elevadas, un despliegue masivo de infraestructura urbana y una degradación irreversible del capital natural, que crean una ‘tragedia de la infraestructura urbana’ que socava la sostenibilidad de las ciudades con el preaviso de la aparición de ruinas urbanas.
The tension between efficiency and equity has been the focus of major debate since equity aspects started to be considered as part of project evaluation procedures (Thomopoulos et al. 2009). In this book, we contribute to the debate by... more
The tension between efficiency and equity has been the focus of major debate since equity aspects started to be considered as part of project evaluation procedures (Thomopoulos et al. 2009). In this book, we contribute to the debate by focusing on the links and trade-offs between accessibility, economic efficiency and equity in both the developed and developing country contexts. Accessibility is a concept that has been central to physical planning and spatial modelling for more than 50 years. Accessibility can be viewed as a product of the land use and transport systems, and describes the extent to which land use and transport systems enable (groups of) individuals to reach activities or destinations by means of a (combination of) transport mode(s) (Geurs and van Wee 2004). From the literature it is clear that accessibility is linked to economic efficiency and equity. In general, increased accessibility resulting from a transport project is considered an important user benefit for people and firms. A traveller can make a trip at less cost or greater convenience; there might be less congestion, and more destinations may be reached in the same time. For firms, firstly, a reduction in interaction cost may increase efficiency of production (that is, time saved can be used in productive activities), and may become more competitive and attract more customers. Secondly, improved commuting conditions may improve the labour market, giving rise to improved productivity. However, the linkage between accessibility and spatial economic development is not straightforward.
Accross river basins water can have different types of values according not only to its production costs but also due to changes in the willingness to pay across the territory. The generalized view that integrated water management must be... more
Accross river basins water can have different types of values according not only to its production costs but also due to changes in the willingness to pay across the territory. The generalized view that integrated water management must be made through a centralised mechanism does not consider those facts and often assumes that command and control policies are the only
Huambo has central capacities able to compete and complement other major towns in Africa such as Johannesburg and Nairobi. Nevertheless, Huambo, the second city of Angola, was at war from 1975 till 2002 and continued to be relatively... more
Huambo has central capacities able to compete and complement other major towns in Africa such as Johannesburg and Nairobi. Nevertheless, Huambo, the second city of Angola, was at war from 1975 till 2002 and continued to be relatively isolated from 2002 till 2006, because it took some time to rebuilt former roads. Furthermore the destruction of the export based activities
Islands are attractive places for tourists and most islands can be, sooner or later, requested by an increasing touristic demand. But islands are also places where natural capital has very defined limits. The aim of this paper is to... more
Islands are attractive places for tourists and most islands can be, sooner or later, requested by an increasing touristic demand. But islands are also places where natural capital has very defined limits. The aim of this paper is to assess the carrying capacity of islands in terms of water in relation to the touristic demand. We use an Input-Output Table
The usual conceptualisation of farmer production system involves three interrelated production systems: a feed production function which inputs are fertiliser, land, weather machinery and labour; a cattle production function based cows,... more
The usual conceptualisation of farmer production system involves three interrelated production systems: a feed production function which inputs are fertiliser, land, weather machinery and labour; a cattle production function based cows, feed - bought or produced - machinery and labour and a conversion production system that generates milk and beef. The aim of this paper is to conceptualise the spatial
Islands are one of the most important destinations for tourism and leisure. However, islands exhibit different levels of attractiveness in the course of time and comparing with other islands. The objective of this paper is to analyze this... more
Islands are one of the most important destinations for tourism and leisure. However, islands exhibit different levels of attractiveness in the course of time and comparing with other islands. The objective of this paper is to analyze this subject for the Archipelago of the Azores, using gravity models and the travel cost method. The study aims to understand different performances
ABSTRACT This article presents a new multi-criteria decision aid methodology, dynamic-PROMETHEE, here used to design electric vehicle charging networks. In applying this methodology to a Portuguese city, results suggest that it is... more
ABSTRACT This article presents a new multi-criteria decision aid methodology, dynamic-PROMETHEE, here used to design electric vehicle charging networks. In applying this methodology to a Portuguese city, results suggest that it is effective in designing electric vehicle charging networks, generating time and policy based scenarios, considering offer and demand and the city’s urban structure. Dynamic-PROMETHE adds to the already known PROMETHEE’s characteristics other useful features, such as decision memory over time, versatility and adaptability. The case study, used here to present the dynamic-PROMETHEE, served as inspiration and base to create this new methodology. It can be used to model different problems and scenarios that may present similar requirement characteristics.
The agenda explain the historical evolution of land uses in São Jorge Island (Azores- Portugal) between 15th-20th century.The economic exploitation of the island space prosecuted itself in simultaneous with his colony, one form to... more
The agenda explain the historical evolution of land uses in São Jorge Island (Azores- Portugal) between 15th-20th century.The economic exploitation of the island space prosecuted itself in simultaneous with his colony, one form to guarantee the auto supplying of the populations. First we assess the capacity of the island territory for different uses based on agronomic analysis and transform these capacities in attractiveness coefficients.Then we design a spatial interaction model with five different sectors which employment can be closely related with surface area, first to five zones in the island and within those zones to small plots of 1 hectare each.Finally we use historical data on population and main export crops in order to calibrate the model for each century. Therefore, based on data on the export crop and on the population it is possible to estimate the different land use of the island for all the sectors and to assess the carrying capacity of the island.
Research Interests:
São Tomé e Príncipe is a small insular country located in the Gulf of Guinea, populated by 160000 persons, living in 1000 square kilometers of a rainforest environment. The GDP pc is 1200 US$ per year, 50% of the economy is... more
São Tomé e Príncipe is a small insular country located in the Gulf of Guinea, populated by 160000 persons, living in 1000 square kilometers of a rainforest environment. The GDP pc is 1200 US$ per year, 50% of the economy is based in auto-consumption and the main engine of the remaining economic system is the external public debt, rents
ABSTRACT System Approach Framework (SAF) includes a sequence of steps with the overall purpose to develop a self- evolving, holistic research approach for integrated appraisal of Coastal Systems so that the existing scientific knowledge... more
ABSTRACT System Approach Framework (SAF) includes a sequence of steps with the overall purpose to develop a self- evolving, holistic research approach for integrated appraisal of Coastal Systems so that the existing scientific knowledge can be available to support deliberative and decision-making processes aimed at improving the sustainability of Coastal Systems by implementing Integrated Coastal Zone Management (ICZM) policies. The main goal is to achieve equilibrium between Ecological, Social and Economic sectors of the Coastal System and to explore it ́s dynamics, as well as, the possible consequences of alternative policy scenarios. Achieving this objective requires a reorganization of the science required to comprehend the interactions between multifaceted natural and social systems at different spatial and temporal scales including the overall economic evaluation of alternative policies. The present work explains SAF using practical examples of its application in two distinct national coastal environments: Southeast coast of Terceira Island and Guadiana Estuary.
Science is driven by research funds, research funds are associated with decision making, and decision making is attached to valuation. Therefore every scientific paradigm tend to devise its own valuation system. Ecconomists prefer cost... more
Science is driven by research funds, research funds are associated with decision making, and decision making is attached to valuation. Therefore every scientific paradigm tend to devise its own valuation system. Ecconomists prefer cost benefit analysis where everything can be translated into money. Planners assume values to infinity which lines in a map difining restrictions and enforceable land uses. Ecologists
Pollution, increase of water demand, and Global Climatic Changes are the main threats that affect water resources and that make crucial the development of effective planning and management strategies of water resources. Agriculture is one... more
Pollution, increase of water demand, and Global Climatic Changes are the main threats that affect water resources and that make crucial the development of effective planning and management strategies of water resources. Agriculture is one of the most important human activity with a major impact on water resources as it requires huge amounts of water and fertilizers. In the Azores
The objective of this paper is to define what problems the city of Angra do Heroísmo (Terceira Island, Azores) faces in what regards urban sustainability, so as to improve the quality of life of the residents and to ensure the adequate... more
The objective of this paper is to define what problems the city of Angra do Heroísmo (Terceira Island, Azores) faces in what regards urban sustainability, so as to improve the quality of life of the residents and to ensure the adequate growth and progress of the city in all areas, as possible. The main themes approached in this work were
In the Azores, dairy farming is the dominant activity of the primary sector, being forestry the remaining activity mainly dominated by Cryptomeria japonica and Eucalyptus globulus. These two species are those that present greater economic... more
In the Azores, dairy farming is the dominant activity of the primary sector, being forestry the remaining activity mainly dominated by Cryptomeria japonica and Eucalyptus globulus. These two species are those that present greater economic interest, being Cryptomeria the most exploited in the Region. The aim of this paper is to analyze the competitiveness of the forest activity regarding dairy

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The tension between economic efficiency and equity is often the focus of major debate. This book focuses on the links and trade-offs between accessibility impacts from transport investments, economic efficiency, and equity in both the... more
The tension between economic efficiency and equity is often the focus of major debate. This book focuses on the links and trade-offs between accessibility impacts from transport investments, economic efficiency, and equity in both the developed and developing country contexts. The book shows that the linkages between accessibility, economic development and equity are not straightforward. The economic effects from transport projects are the result of a complex pattern of effects leading in different directions. Transportation equity analyses are challenging because there are several types of equity, various ways to categorize people for equity analysis purposes, numerous impacts to consider, and various ways of measuring these impacts. This book contributes to this field of research by showing that accessibility instruments can address both efficiency and equity issues, thus providing valuable information for decision-making regarding the spatial allocation of public services.