The proof of the theorem of existence of the ruptures, namely the proof of maximality, is improved. The theorem may be used in economics and explain the well-known problems such as Allais’ paradox. Illustrated examples of ruptures are presented.

The goal of this study is to present and to analyze a methodology to estimate Input-Output Matrices using preliminary data from the Brazilian National Accounts. This methodology is tested for the years of 1994 and 1996, where the results obtained from the input-output matrices (definitive...

This article defines and characterizes the cooperative ‘sector’ in the Paraná economy and disaggregates the sector Agriculture and components of Food Industry of the input-output table, made for the state for the years 1980 and 1985, in Cooperative and non-cooperative. The aim of this...

Following Furtuoso and Guilhoto (2003) the GDP of the Brazilian Agribusiness is estimated to be around 27% of the Brazilian GDP in 2000, and the latest numbers show that it could be reaching 30% of the Brazilian GDP in 2003. Despite its importance for the Brazilian economy as a whole, the size...

The use of linkages to compare productive structures and discover key sectors is an active focus of research in input-output field. In this paper, an extension of the called multilevel indicators (García et al., 2008) to the key sector determination is proposed. The multilevel indicators not...

This article, using input-output tables, makes an analysis of the structure of production, consumption, and income distribution in the Brazilian economy in 1975 and 1980. The results show that: a) the dynamic in the economy is given by the consumers in the income group between 5 and 20 minimum...

The main goal of this paper is to analyze the level of development in the Agribusiness of the Brazilian region South for the years of 1985, 1990 and 1995; using inter-regional input-output analysis. The results obtained show: how the Agribusiness is structured inside the regions; and how the trade...

The Paraná State, one of the fastest growing states in the Brazilian economy, has gone through a lot of structural changes in the last two decades. In this time period, the primary sector activities lost in importance to the secondary and the tertiary sectors. In this process of going from an...

This paper applies a data envelopment analysis (DEA) method to assess technical efficiency of both private and public universities in Italy. Moving from the traditional context where inputs and outputs are assumed to be non-negative, a directional distance function approach has been applied in...

The recent discussions that focused on the problems of the Uruguay Round of the General Agreement on Tariffs and Trade [GATT] together with the emergence of strengthened and expanded free trade areas [such as NAFTA, European Union and MERCOSUL/MERCOSUR] have created the need for careful analysis...