Heterogeneous effects

Question 1

Heterogeneous effects

Answer 1

Varying effects from the treatment between the subjects.

Question 2

Bonferroni correction

Answer 2

If you conduct h hypothesis tests, divide your target p-value by h.

Question 3

Multiple comparisons problem

Answer 3

If the researcher compares enough subgroups, odds are good that statistically significant interactions with a least one covariate will pop up merely by chance.

Question 4

Systematic heterogeneity

Answer 4

Variation in the error term that can be predicted by observed covariates or other experimental factors

Question 5

Idiosyncratic heterogeneity

Answer 5

Residual variation in the error term that is not predicted by covariates or other experimental factors.

Question 6

Marginal effects

Answer 6

For a level of a variable Z, is the effect of X on Y different from zero?

Question 7

Interaction effects

Answer 7

Is the effect of X on Y different across levels of a variable Z?