Percorrer por autor "Ramos, Pedro"
A mostrar 1 - 3 de 3
Resultados por página
Opções de ordenação
- Input-output modelling based on total-use rectangular tables: is this a better way?Publication . Sargento, Ana; Ramos, Pedro; Hewings, GeoffreyInput-output tables can be presented in different formats, according to three main criteria: 1) symmetric or rectangular format; 2) total or domestic-use flows and 3) valuation prices (basic prices – bp or purchasers’ prices – pp). Official National Accounts (at least in EU) produce in a regular base a total use rectangular table at pp – also known as the Make and Use (M&U) format – that is different from the lay-out upon which traditional input-output models were developed (domestic use, symmetric, bp). The problem with this latter one is of course that it is only available at times in many countries. The objective of this paper is to prove (under common hypotheses) the equivalence between two alternative procedures, from the point of view of the results of an input-output model: 1) to convert the M&U input-output table into the traditional format – a domestic-use symmetric table at bp – and then implement the model; 2) to perform the direct modelling of the original table (the total-use rectangular table at pp). That equivalence is illustrated with Portuguese data for the year 2002.
- Proyección de tablas input-output birregionales y cuantificación del cross-haulingPublication . López, Xesús; Ramos, Pedro; Sargento, Ana; Incera, AndréA first approximation of the intermediate consumption matrix is necessary in the process of regionalization of national input-output tables, according to the available information at regional level. Different possibilities appear for this adjustment as could be: using location quotients, gravity models or commodity balance. Then, the most efficient solution should be searched by correction methods. The use of location quotients is correct to generate domestic tables, but their traditional formulations do not detect cross-hauling and, therefore, it involves an overestimation of the domestic intermediate consumption. This paper proposes a modification of this formulation smoothing magnitudes that interfere with the updating processes, so it is feasible to estimate gross exports and imports matrices. For practical purposes, a calibration procedure will be formalized in order to optimize the results of the bi-regional table between Galicia and the rest of Spain. This last test is possible because there are enough data included in the regional input-output framework.
- Regional planning insights from a portuguese bi-regional input-output model – the potential impact of agri food industryPublication . Sargento, Ana; Ramos, Pedro; Barata, Eduardo; Cruz, LuísIn Portugal, the public debate at regional level is typically engaged in the discussion of asymmetries amongst the ‘interior’ and the ‘coast’. What is often discussed, with political and social relevance, is the extent of the interior’s delay (in terms of development) comparatively to the coastal region, and into what extent the dynamics of the economy, or eventually the ‘bias’ introduced by public policies, contributes to this drawback. Interestingly, however, the Portuguese regional science has miscarried this debate, largely on the grounds that the official statistics do not include this cleavage. Indeed, the design of the NUTS II in Portugal splits the country horizontally, forgetting the vertical gap that splits the interior regions from the coastal ones. The first objective of this paper is therefore to refocus the debate - in scientific terms – on the actual territorial disparity in Portugal: the contrast Coast-Interior. Accordingly, this paper starts by presenting the structure of a bi-regional Input-Output (IO) model for the Portuguese Economy. We consider a rectangular IO model (431 products by 125 industries), decomposing the Portuguese economy into two regions with comparable territorial sizes (the Coastal Region, comprising 44% of the Portuguese continental area, and the Interior Region). the model is ‘closed’ for the private consumption of households below 65 (which is supposed to be endogenous, as it depends on regional employment and therefore on households’ earnings. Multi-regional IO models describe the inter-sectoral dependencies both within the region and between the regions. The main aim is then to assess how the effects of a shock that hits only one of the regions are ‘distributed’ among the two regions. In particular, we intend to analyse at a greater detail the role of the agri-food sector in the Interior Region. Overall results illustrate the dependence of the Interior on the Coastal region, and that the (positive or negative) effects of a shock that hits the Interior Region tend to leak significantly to the Coastal Region, while an exogenous event in the Coastal Region tends to see its effects relatively more contained within the region.Thus, this analysis can be particularly relevant to policy-makers in dealing with regional and territorial planning, as they are better informed about the root causes of some outcomes. Accordingly, a summary of the key lessons learned and a discussion of their policy relevance, both at regional and national levels, will be offered.