The concept of exogeneity is important because
A) it clarifies whether or not the variable is determined inside or outside your model.
B) maximum likelihood estimation is no longer valid.
C) under strict exogeneity, OLS may not be efficient as an estimator of dynamic causal effects.
D) endogenous variables are not stationary, but exogenous variables are.
Answer: C
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The fallacy of composition is:
a. the erroneous view that an economic activity can sometimes exceed the sum of its components b. the erroneous view that what is true for the individual will also be true for the group. c. the view that the aggregation of economic activity will necessarily lead to an outcome that is different than the outcome generated by each individual in the group. d. the idea that association need not imply causation.
Which two types of goods are rival in consumption?