The phrase "a valid and effective" is correct and usable in written English.
It can be used when discussing the legitimacy and efficiency of a method, approach, or argument.
Example: "The research provided a valid and effective solution to the problem at hand."
Alternatives: "a legitimate and efficient" or "a sound and practical".
"If we get such a valid and effective order, we will comply with it," said David Palombi, a spokesman for Freddie Mac.
The model thus could be a valid and effective tool to evaluate information/behavior-based intervention strategies.
This paper posits that the concept of global public goods, specifically with regards to health, is both a valid and effective means of promoting global health outcomes.
If a participating FFI (or branch thereof) is prohibited by law from reporting the information required under paragraph (d) of this section with respect to a U.S. account that it maintains unless a valid and effective waiver of such law is obtained, the participating FFI must request a valid and effective waiver (including by obtaining waivers from all relevant account holders if necessary).
Our results indicate that the cell-based assay we developed is a valid and effective method for examining the transactivating activity of ICP0.
It is shown that the MIDW interpolation method is a valid and effective alternative for characterizing land price distribution by comparison with ordinary IDW and Kriging methods.
A constitutional amendment, change in the law, or appeal to a higher court are all valid and effective options for influencing the outcome of future decisions.
It may be a more productive and a potentially more patient-centred approach to acknowledge that for these smokers quitting unassisted is a valid and potentially effective option.
A written assessment test is a valid and cost-effective instrument to measure communication skills.
It has been established formerly that pulse contour analysis CO is a valid and cost-effective device for CO determination after calibration.
Pulse contour analysis CO has been established as a valid and cost-effective device for CO determination after calibration [ 18, 19].
