5. ____________ Well done RD estimates generally exhibit:
A. good internal validity, and good external validity.
B. poor internal validity, and poor external validity.
C. good internal validity, but poor external validity.
D. poor internal validity, but good external validity.
4. ____________ How do we describe an estimated treatment effect that remains relatively stable (unchanged) as additional control variables are added?
A. Endogenous
B. Defiant
C. Exogenous
D. Robust
5) (A) Internal validity refers to refers to estimates that are free from bias arising due to sampling issues. External validity refers to applicability of estimates from sample to a larger sample. Thus Well done RD estimates generally exhibit: good internal validity, and good external validity.
6) (D) Robustness is a property of the estimator which ensures that estimates do not change much even when more controls are added. Thus an estimated treatment effect that remains relatively stable (unchanged) as additional control variables are added is called robust
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