Lendas urbanas da Economia
Bem, Ronald Coase desfez aquela dos faróis como bens públicos (outra hora falo disto, se o Leo, o André ou o Ronald não postarem antes). Mas esta aqui é melhor: o clássico exemplo dos bens de Giffen.
O divertido artigo que estou linkando (linkando, postando....teria de ter aspas aqui....) resenha um estudo do falecido Sherwin Rosen, que coloca sérias dúvidas sobre a fábula das batatas irlandesas que seriam, segundo os velhos livros de Microeconomia (ah...o chatíssimo Ferguson...), um bem de Giffen.
The Irish potato famine teaches us the importance of distinguishing between temporary and permanent catastrophes. These lessons are underscored by the Great Famine research of the University of Chicago's professor Sherwin Rosen. But Rosen's work also demolishes one of the great fables of economics classrooms, shared by generations of economics professors with their students. Here's how the fable goes: Imagine a 19th-century Irishman who eats lots of potatoes and a little meat. As potatoes become scarcer and their price starts to rise, our Irishman's budget is strained to the point where he is led to cut back on meat and demand even more potatoes. The heightened demand pushes the price up further and we're off on a vicious circle.
Vou à dentista. Depois a gente discute mais, leitor.
Bem, Ronald Coase desfez aquela dos faróis como bens públicos (outra hora falo disto, se o Leo, o André ou o Ronald não postarem antes). Mas esta aqui é melhor: o clássico exemplo dos bens de Giffen.
O divertido artigo que estou linkando (linkando, postando....teria de ter aspas aqui....) resenha um estudo do falecido Sherwin Rosen, que coloca sérias dúvidas sobre a fábula das batatas irlandesas que seriam, segundo os velhos livros de Microeconomia (ah...o chatíssimo Ferguson...), um bem de Giffen.
The Irish potato famine teaches us the importance of distinguishing between temporary and permanent catastrophes. These lessons are underscored by the Great Famine research of the University of Chicago's professor Sherwin Rosen. But Rosen's work also demolishes one of the great fables of economics classrooms, shared by generations of economics professors with their students. Here's how the fable goes: Imagine a 19th-century Irishman who eats lots of potatoes and a little meat. As potatoes become scarcer and their price starts to rise, our Irishman's budget is strained to the point where he is led to cut back on meat and demand even more potatoes. The heightened demand pushes the price up further and we're off on a vicious circle.
Vou à dentista. Depois a gente discute mais, leitor.
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