A method for constructing commodity by industry flow matrices

This paper presents theory and methods used to construct an interregional commodity by industry flow matrix for the United States. The interregional flow matrix method involves the construction of single-state (and DC) social accounting matrices (SAMs) using data derived from IMPLAN. Once complete, the interregional flows connecting states are estimated using a method based on the commodity flow survey data published by the Bureau of Transportation Statistics. The estimated interregional SAM is then adjusted to insure the integrity of intra-regional and system-wide accounts. The procedures have been designed with ease of replicability as a goal so that updates and extensions of the database can be generated efficiently and at low cost as new data are released. The resulting US interregional framework describes flows within and among the 51 regions. The method is flexible and will provide a valuable database for a broad range of analyses on regions, interregional relationships, and policy

Reticular Systems to Identify Aggregation and Attraction Potentials in Island Contexts. The Case Study of Sardinia (Italy)

The purpose of the article is to evaluate territorial hierarchies, internal to an island context, through the theory of central places. To this end, the authors want to demonstrate how some key points of these theories are still relevant all the more if applied to geographically closed contexts, such as an island. Starting from these premises, this paper begins with a literature revision on the most important theories on central places with particular reference to the theories closest to contemporary world. Therefore, the authors study the attraction and aggregation potential of the Sardinian case study, defined by the most suitable localization theories for studying island contexts. This allowed not only to study the analysis of flows through a territorial-hierarchical model, under the theoretical assumptions of the Central Places Theories (CPTs), but also to develop a model and a reticular system on several levels, starting from the population data. This paper shows a first phase of a wider research and provides a bibliographic framework to understand how the theories of central places are still suitable for studying a closed system like an island

A spatio-temporal econometric model of regional growth in Spain

Regional growth, Panel data, Spatial dependence, Spillovers, Spain, C31, C33, J24, O18, R11,