Private versus public consumption within groups : testing the nature of goods from aggregate data

We study the testability implications of public versus private consumption. The distinguishing feature of our approach is that we start from a revealed preference characterization of collectively rational behavior. Remarkably, we find that assumptions regarding the public or private nature of specific goods do have testability implications, even if one only observes the aggregate group consumption. In fact, these testability implications apply as soon as the analysis includes three goods and four obervations. This stands in sharp contrast with existing results that start from a differential characterization of collectively rational behavior. In our opinion, our revealed preference approach obtains stronger testability conclusions because it focuses on a global characterization of collective rationality, whereas the differential approach starts from a local characterization.Collective model, revealed preferences, public goods, private goods, consumption externalities.

The pattern of inequality in the spatial distribution of the Argentine manufacturing industry (1973-2003)

En este trabajo se compara el grado de desigualdad en la distribución espacial de la industria manufacturera argentina a nivel regional y provincial entre los años anterior y posterior al periodo que va de 1974 a 2002, durante el cual se abandonó la política de sustitución de importaciones y la participación del sector manufacturero en el producto interno bruto mostró una tendencia decreciente. Se analiza con métodos cuantitativos datos censales sobre valor agregado y puestos de trabajo ocupados en 1973 y 2003. Se concluye que la desigualdad total disminuyó conservando su patrón espacialThis paper compares the degree of inequality in the spatial distribution of the Argentine manufacturing industry at regional and provincial levels between the years preceding and following the period from 1974 to 2002, during which the policy of import substitution was abandoned and the share of the manufacturing sector in the gross domestic product showed a decreasing trend. It analyzes with quantitative methods census data on value added and jobs held in 1973 and 2003. It is concluded that total inequality decreased while retaining its spatial patternFil: Pellegrini, José Luis. Universidad Nacional de Rosario. Facultad de Cs.económicas y Estadística; ArgentinaFil: Platino, Marina. Universidad Nacional de Rosario. Facultad de Cs.económicas y Estadística; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

A Measure of Social Loss for Production Economies with Externalities

In this paper we consider a production economy and adopt a cooperative approach to equilibrium analysis which allows each individual to cooperate with others and to form a coalition whose members have access to the available technologies. Our definition of the core requires a blocking coalition to take account of the consequences of its blocking for the production of the counter-coalition. Following Montesano (2002), we introduce a measure of social loss with respect to the core of the economy which characterizes the corresponding core allocations. Our characterization holds in the presence of consumption externalities and an optimistic attitude of coalition agents with respect to the behavior of outsiders

ANALISA PENGUJIAN MEKANIK MATERIAL BOVINE HIDROKSIAPATIT (BHA)/SHELLAC/TEPUNG SORGUM

Hydroxyapatite is one of the most commonly used biomaterials in biomedical applications. Hydroxyapatite itself can be produced from cow bone (bovine) which is one of many materials we easily find and have the same structure with human bones. The objectives of this study were to find out the hardness, compressive strength, and density of bovine hydroxyapatite (BHA)/shellac/sorghum materials. Hydroxyapatite used from bovine bone, shellac as a binder, and sorghum flour to make porous. Bovine bone powder in calcined 700oC, then compacted with sorghum flour and shellac.After that, sintered in temperature 1000oC. Adding sorgum flour caused a decrease mechanical properties and increase the porosity. The result of highest hardness and compresive strenghts 59,10 HVN and 1,67 MPa with the density 1594 kg/m3 on variation of BHA/shellac/sorghum flour 90/10 %volume.While the lowest hardness and the compresive strenght is 12,7 HVN and 0,03 MPa with the density 1115 kg/m3 variation BHA/Shellac/sorghum flour 50/50 %volume

Existence, regularity and testability results in economic models with externalities

2008 - 2009This thesis deals with economic models in the presence of externalities. The thesis consists of three chapters. In chapter 1, we consider a general model of production economies with consumption and production externalities. That is, the choices of all agents (households and firms) affect individual consumption sets, individual preferences and production technologies. Describing equlibria in terms of first order conditions and market clearing conditions, and using a homotopy, under differentiability and boundary conditions, we prove the non-emptiness and compactness of the set of competitive equilibria with consumptions and prices strictly positive. In chapter 2 we consider a general model of private ownership economies with consumption and production externalities. Showing by an example that basic assumptions are not enough to guarantee a regularity result in the space of initial endowments, we provide sufficient conditions for the regularity in the space of endowments and transformation functions. In chapter 3 we study the testability implications of public versus private consumption in collective models of group consumption. To the contrary at the previous literature, we find that assumptions regarding the public or private nature of specific goods do have testability implications, even if one only observes the aggregate group consumption. In fact, these testability implications apply as soon as the analysis includes three goods and four observations. In our opinion, our revealed preference approach obtains stronger testability conclusions because it focuses on conditions which involve personalized prices and personalized quantities, although we do not require that personalized prices and personalized quantities are observable. [edited by author]VIII n.s