Generally speaking, the difference-in-differences is defined to be the:
A) difference in outcomes from random assignment.
B) difference in outcomes from different treatment levels.
C) difference in the temporal change for the outcome between treated and untreated groups.
D) None of the answers is correct.

Question

Quizplus · Accepted Answer

Difference-in-differences compares the change in outcomes over time between a treated group and an untreated group. This method is commonly used in quasi-experimental research designs where random assignment to treatment is not feasible. Option A refers to a randomized experiment, while option B is more applicable to experiments with multiple treatment levels. Option D is incorrect because one of the choices must be correct.

Generally Speaking, the Difference-In-Differences Is Defined to Be The