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Aantekeningen Hoorcollege 3 - Macro-Economie
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Volledige samenvatting van alle stof behandeld in hoorcollege 3.
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Tentamen - Macro-Economie - Blok 3 - Erasmus - Economie/Econometrie
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Summary Macroeconomics PART 2, ISBN: 9780198737513 Macro-economie (FEB21022)
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Samenvatting Macroeconomics PART 1, ISBN: 9780198737513 Macro-economie (FB21022)
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Hoorcollege 3 – Lange Termijn Groei – H3 (8/1)Eigenschappen
Productiefunctie: Marginale productiviteit > 0, afnemende meeropbrengsten en constante
schaalopbrengsten. Van belang voor de intensieve vorm.
Economie convergeert niet automatisch naar golden rule steady state, dus pas de spaarvoet s aan.
Dit leidt tot een nieuwe steady state met meer consumptie.
Dynamisch inefficiënt: door meer te consumeren kan de consumptie van alle generaties worden
verhoogd. “Free-lunch” principe. Rechts van de golden rule steady state. (Pareto-inefficiënt).
Dynamisch efficiënt: door minder te consumeren kan de consumptie van toekomstige generaties
worden verhoogd. “No-pain no-gain” principe. Links van de golden rule steady state. (Pareto-
efficiënt).
Uitbreiding Solow-Model
Oude situatie:
Δk
=
Δ ( KL ) = ΔK − ΔL =0 ΔK =0
k K K L K
L
Δy
=
Δ ( YL ) = ΔY − ΔL =0 ΔY =0
y Y Y L Y
L
Er is in dit model geen groei in het model: de stylized facts kloppen niet.
Bevolkingsgroei:
L groeit met n. In de steady state blijven k en y constant. Als L groeit met n, dan groeien Y en K ook
met n.
Δk
Δ ( KL ) = ΔK − ΔL , met ΔL =n , ΔK =I −δ K =sy −δ K Δk = ΔK −n k¿ ΔK K −nk
k
=
K K L L K (K ) K L
L
ΔK Y K
¿ −nk¿ s −δ −nk
L L L
¿ sy−( δ +n ) k¿ s f ( k )−( δ+ n ) k
Δk =s∗f ( k )−( δ +n )∗k
In deze nieuwe steady state zijn k en y opnieuw constant. L groeit nu met n, net als K en Y. Er is dus
permanente groei van K en Y, maar nog niet van k en y.
Technologische vooruitgang:
Y = F (K, A * L) = F(K, E) in Cobb-Douglas: Y =K a ( A∗L)1−a
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