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♪ (música) ♪

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[Narrador] Los economistas
usan téminos similares

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para dos cosas que son diferentes:

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un cambio en la cantidad demandada
versus un cambio en la demanada.

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Esto puede ser un poco confuso,
así que revisémoslo.

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Un cambio en la cantidad de la demandad

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se refiere al movimiento a lo largo 
de una curva de la demanda,

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el cual es ocasionado
por un cambio en el precio.

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Un cambio en la demanda se refiere
a un cambio en la curva de la demanda,

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el cual es ocasionado
por uno de los siguientes factores:

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ingreso, preferencias,

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cambios en el precio
de bienes relacionados, etcétera.

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Ilustremos la diferencia
con un ejemplo refrescante.

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Usaremos la gaseosa.

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[Mijer1] Uhm, ¿quieres decir refresco?

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[Hombre] Esa es una Coca,

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[Mijer2] En realidad, bebida carbonatada
es el término más preciso, así que...

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[Narrador] Bien, usaremos
bebidas azucaradas, saborizadas, ¿ok?

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Primero, recapitulemos con el cambio
de la cantidad demandada.

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Supónganse que el precio
de las bebidas azucaradas, saborizadas

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va de $3 a $4.

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¿Qué pasa?

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