The phrase "and effectiveness of each" is correct and usable in written English.
It can be used when discussing the performance or impact of multiple items or methods in a comparative context.
Example: "We need to evaluate the efficiency and effectiveness of each marketing strategy before making a decision."
Alternatives: "and efficacy of each" or "and performance of each".
The usability and effectiveness of each interface was evaluated.
In a future class, students may share their stories with peers and discuss the difficulties and effectiveness of each of the research methods.
And this will take time; additional testing is needed to ensure the safety and effectiveness of each new generic before it is approved.
To the Editor: As a psychiatrist and psychoanalyst, I constantly compare the value and effectiveness of each type of treatment.
Following the development of the soft switching approach, numerical simulations are used to verify the positioning performance and effectiveness of each switching strategy.
From that, instructors can judge the difficulty and effectiveness of each exercise, as well as see how the probability of getting the answer right increases along with the ability of each student.
The university is participating in a study being conducted by the Food and Drug Administration into the safety and effectiveness of TPA, and the results of each use are recorded.
The Council's resolution, recommended by Secretary General Kofi Annan, spoke only of improving the efficiency and effectiveness of the tribunals by putting each one under a separate prosecutor.
The multiple datasets were compared through visual inspection of both global and local areas, and the effectiveness of each system for dealing with this type of object was subjectively assessed.
To summarize, example-problem pairs have been shown to be more effective than examples or problems only, and the effectiveness of each method may depend on the prior knowledge of the learners.
