Università degli Studi di Cagliari
Facoltà di Scienze Economiche, Giuridiche e Politiche
Dipartimento di Scienze Sociali e delle Istituzioni
Corso di Laurea in Scienze Politiche
Prof. Romano Piras
ESAME DI ECONOMIA POLITICA
6 settembre 2016
Cognome ________________________
Nome _________________________ Matricola n. _______________
Esercizio 1
Giovanni consuma frutta (bene x) e verdura (bene y). Il prezzo unitario della frutta è pari a 3€ al chilo, quello della
verdura è pari a 1,5€ al chilo. Le sue preferenze sono rappresentate dalla funzione di utilità U(x, y)=10xy e il tasso
marginale di sostituzione tra i due beni è pari a y/x.
1.
Scrivete e rappresentate graficamente il vincolo di bilancio di Giovanni, sapendo che il reddito di cui dispone
è pari a 300€ mensili. Indicate bene il valore delle due intercette e dell’inclinazione del vincolo di bilancio.
Ricordate di indicare il bene x sull’asse orizzontale ed il bene y su quello verticale.
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2. Rappresentate la mappa delle curve di indifferenza fra frutta e verdura.
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1
3. Calcolate analiticamente il paniere ottimo scelto da Giovanni.
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4. Illustrate graficamente il paniere ottimo.
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5. Se il reddito si dimezza, quale sarà il nuovo paniere ottimo scelto da Giovanni.
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2
Esercizio 2
Si ipotizzi che un monopolista abbia la seguente funzione di costo marginale 𝑀𝐶 = 30 + 2𝑄 e che fronteggi una
funzione di domanda pari a 𝑃 = 100 − 𝑄.
1.
Quale livello di produzione sceglierà il monopolista?
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2.
Quale prezzo praticherà?
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3.
Se il mercato fosse perfettamente concorrenziale quali sarebbero il livello di produzione ed il prezzo di
equilibrio di mercato?
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Tema 1. Tecnologia produttiva e costi di produzione
1) Che cosa si intende per funzione di produzione?
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2) Cosa sono i fattori della produzione?
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3) Che differenza esiste tra breve e lungo periodo?
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4) Descrivete nel dettaglio le varie tipologie di costo di breve periodo.
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Tema 2. La politica fiscale e il bilancio pubblico
1) Che cosa si intende per “politiche fiscali”?
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2) Che cos’è il “deficit pubblico”?
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3) Che cos’è il “debito pubblico”?
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4) Che relazione esiste tra “deficit pubblico” e “debito pubblico”?
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5) Che cosa sono le “imposte nette”?
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6) Da che cosa è dato il “moltiplicare del reddito” in presenza di un’aliquota fiscale netta t proporzionale al
reddito?.
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7) Quali sono gli effetti della spesa pubblica sull’output?
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