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In an economic model, an exogenous variable is one whose measure is determined outside the model and is imposed on the model, and an exogenous change is a change in an exogenous variable. In contrast, an endogenous variable is a variable whose measure is determined by the model. An endogenous change is a change in an endogenous variable in response to an exogenous change that is imposed upon the model.

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  • Exogene und endogene Variable (de)
  • Exogenous and endogenous variables (en)
  • Variáveis exógenas e endógenas (pt)
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  • In ökonomischen und ökonometrischen Modellen bezeichnet eine exogene Variable eine Variable, die außerhalb des Modells bestimmt wird und den Input eines Modells darstellt. Anders ausgedrückt: Exogene Variablen sind in dem Augenblick, in dem sie in das Modell eingebracht werden, fest vorgegeben. Dagegen werden endogene Variablen innerhalb des Modells determiniert und stellen somit den Output eines Modells dar.Das mit den Variablen spezifizierte Modell zeigt auf, wie sich die Veränderung einer exogenen Variablen ceteris paribus auf alle endogenen Variablen auswirkt. (de)
  • In an economic model, an exogenous variable is one whose measure is determined outside the model and is imposed on the model, and an exogenous change is a change in an exogenous variable. In contrast, an endogenous variable is a variable whose measure is determined by the model. An endogenous change is a change in an endogenous variable in response to an exogenous change that is imposed upon the model. (en)
  • Em modelos econômicos e econométricos, uma variável exógena refere-se a uma variável que é determinada fora do modelo e representa as entradas de um modelo. Em outras palavras, variáveis exógenas são fixadas no momento em que são introduzidas no modelo. Em contraste, variáveis endógenas são determinadas dentro do modelo e, portanto, representam as saídas de um modelo. O modelo especificado com as variáveis mostra como a mudança de uma variável exógena coeteris paribus afeta todas as variáveis endógenas. (pt)
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  • In ökonomischen und ökonometrischen Modellen bezeichnet eine exogene Variable eine Variable, die außerhalb des Modells bestimmt wird und den Input eines Modells darstellt. Anders ausgedrückt: Exogene Variablen sind in dem Augenblick, in dem sie in das Modell eingebracht werden, fest vorgegeben. Dagegen werden endogene Variablen innerhalb des Modells determiniert und stellen somit den Output eines Modells dar.Das mit den Variablen spezifizierte Modell zeigt auf, wie sich die Veränderung einer exogenen Variablen ceteris paribus auf alle endogenen Variablen auswirkt. Im Allgemeinen werden auch erklärende Variablen, die nicht mit der Störgröße einer Regressionsfunktion korreliert sind, als exogene Variablen bezeichnet. In Eingleichungsmodellen stimmen die Begriffe „erklärte Variable (Regressand) – endogene Variable“, sowie „erklärende Variable (Regressor) – exogene Variable“ überein. Dagegen können in Mehrgleichungsmodellen endogene Variablen sowohl Regressor, als auch Regressand sein; exogene Variablen jedoch wiederum nur Regressoren. (de)
  • In an economic model, an exogenous variable is one whose measure is determined outside the model and is imposed on the model, and an exogenous change is a change in an exogenous variable. In contrast, an endogenous variable is a variable whose measure is determined by the model. An endogenous change is a change in an endogenous variable in response to an exogenous change that is imposed upon the model. The term endogeneity in econometrics has a related but distinct meaning. An endogenous random variable is correlated with the error term in the econometric model, while an exogenous variable is not. (en)
  • Em modelos econômicos e econométricos, uma variável exógena refere-se a uma variável que é determinada fora do modelo e representa as entradas de um modelo. Em outras palavras, variáveis exógenas são fixadas no momento em que são introduzidas no modelo. Em contraste, variáveis endógenas são determinadas dentro do modelo e, portanto, representam as saídas de um modelo. O modelo especificado com as variáveis mostra como a mudança de uma variável exógena coeteris paribus afeta todas as variáveis endógenas. Geralmente também variáveis explicativas não são perturbações de uma função de regressão, mas estão correlacionados, sendo por isso chamadas de variáveis exógenas. Nos modelos de desigualdade, os termos "variável declarada (regressiva) - variável endógena", bem como "variável explicativa (regressor) - variável exógena" se aplicam. Em contraste, em modelos de multi-equação, as variáveis endógenas podem ser regressores e regressões de areia; variáveis exógenas, no entanto, apenas nos regressores. (pt)
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