In practice,it is often difficult to identify appropriate variables to serve as a basis
for matching,and,once identified,to readily complete the matching process.

Question

Quizplus · Accepted Answer

Matching requires identifying appropriate variables that are both predictive of the outcome and well-balanced across treatment and control groups. This can be a challenging task, and even when appropriate variables are identified, the process of completing the matching may be time-consuming and complex.

In Practice,it Is Often Difficult to Identify Appropriate Variables to Serve