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Consumo: quota di reddito destinata a soddisfare bisogni Modelli macro economici del consumo: Keynes : il consumo cresce col reddito, ma in misura minore La propensione marginale al consumo è: 0 <   C/  Y < 1 Ma…Kuznets e Goldsmith (anni ’40)  osservano una forte stabilità del rapporto  Y-C/Y  che contraddice l’ipotesi di propensione marginale <1
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Il principale strumento di analisi: l’elasticità Def.= Rapporto tra la variazione relativa della quantità domandata e la variazione (infinitesima) relativa del prezzo
Esempio: Curva di domanda:
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
Nasce origine Asint.orizz. No asint.orriz . Spesa >0 saturazione asintoto orizz. PM costante EL   1 Poco utile Note Elasticità Prop.media b Prop.marg. equazione Sigmoide Semilog iperbole Retta funzione
Additività Valori estremi Elast.costante Note Elasticità Prop.media Prop.marg. equazione Leser Doppio log funzione
Le più utilizzate: Semi-logaritmica Doppio-logaritmica Leser Solo Leser garantisce addività, cioè confronti tra  beni diversi

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Consumi

  • 1. Consumo: quota di reddito destinata a soddisfare bisogni Modelli macro economici del consumo: Keynes : il consumo cresce col reddito, ma in misura minore La propensione marginale al consumo è: 0 <  C/  Y < 1 Ma…Kuznets e Goldsmith (anni ’40) osservano una forte stabilità del rapporto Y-C/Y che contraddice l’ipotesi di propensione marginale <1
  • 2.
  • 3.
  • 4.
  • 5. Il principale strumento di analisi: l’elasticità Def.= Rapporto tra la variazione relativa della quantità domandata e la variazione (infinitesima) relativa del prezzo
  • 6. Esempio: Curva di domanda:
  • 7.
  • 8.
  • 9.  
  • 10.  
  • 11. Nasce origine Asint.orizz. No asint.orriz . Spesa >0 saturazione asintoto orizz. PM costante EL  1 Poco utile Note Elasticità Prop.media b Prop.marg. equazione Sigmoide Semilog iperbole Retta funzione
  • 12. Additività Valori estremi Elast.costante Note Elasticità Prop.media Prop.marg. equazione Leser Doppio log funzione
  • 13. Le più utilizzate: Semi-logaritmica Doppio-logaritmica Leser Solo Leser garantisce addività, cioè confronti tra beni diversi