When There Is a Single Instrument and Single Regressor, the TSLS

question 13

Multiple Choice

When there is a single instrument and single regressor, the TSLS estimator for the slope can be calculated as follows:

• A) \(\hat { \beta } _ { 1 } ^ { \text {TSLS } } = \frac { S _ { Z Y } } { S _ { Z x } }\)
• B) \(\hat { \beta } _ { 1 } ^ { \text {TSLS } } = \frac { S _ { X Y } } { S _ { X } ^ { 2 } }\)
• C) \(\hat { \beta } _ { 1 } ^ { \text {TSLS } } = \frac { S _ { Z X } } { S _ { Z Y } }\)
• D) \(\hat { \beta } _ { 1 } ^ { \text {TSLS} } = \frac { S _ { Z Y } } { S _ { Z } ^ { 2 } }\)

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