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Regolazione dei prezzi o razionamento: l'efficacia dei due sistemi di allocazione nella fornitura di risorse scarse a coloro che ne hanno maggiore necessita'.

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  • Di Novi, Cinzia

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Abstract

Usando un semplice modello formale, dovuto a Martin Weitzman, questo paper analizza sotto quali condizioni il sistema dei prezzi sia piu' efficace del sistema di razionamento, nel fornire un determinato bene, presente in quantita' scarsa, a coloro che ne hanno una maggiore necessita' , in presenza di informazione incompleta. La risposta dipende dalla distribuzione dei bisogni e dalla distribuzione del reddito. Il sistema dei prezzi gode di un grande vantaggio comparato, nel fornire un bene scarso e nel raggiungere i piu' bisognosi, quando nella societa' la distribuzione dei bisogni e' molto dispersa e la distribuzione del reddito e' pressoche' egalitaria. Invece, il razionamento risulta essere piu' efficace quando i bisogni sono uniformi ma vi e' una forte ineguaglianza nella distribuzione del reddito. Rielaborando tale modello, inoltre, e' possibile dimostrare che in presenza di una funzione cubica di perdita di efficacia, il vantaggio comparato di un sistema sull'altro dipende dall'asimmetria della distribuzione del reddito. Si mostra, infine, come il meccanismo di razionamento mediante coda possa rappresentare una possibile soluzione al problema dell'informazione incompleta..

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File URL: http://polis.unipmn.it/pubbl/RePEc/uca/ucapdv/dinovi1.pdf
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Bibliographic Info

Paper provided by Institute of Public Policy and Public Choice - POLIS in its series POLIS Working Papers with number 35.

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Length: 26 pages
Date of creation: Oct 2003
Date of revision:
Handle: RePEc:uca:ucapdv:35

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Web page: http://polis.unipmn.it

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  1. Stiglitz, Joseph E., 1989. "Imperfect information in the product market," Handbook of Industrial Organization, in: R. Schmalensee & R. Willig (ed.), Handbook of Industrial Organization, edition 1, volume 1, chapter 13, pages 769-847 Elsevier.
  2. Marilena Biey & Roberto Zanola, 2005. "The Market for Picasso Prints: A Hybrid Model Approach," Journal of Cultural Economics, Springer, vol. 29(2), pages 127-136, May.
  3. Montrucchio, Luigi & Privileggi, Fabio, 2001. "On Fragility of Bubbles in Equilibrium Asset Pricing Models of Lucas-Type," Journal of Economic Theory, Elsevier, vol. 101(1), pages 158-188, November.
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