The phrase "effect and effectiveness" is correct and usable in written English.
You can use it when you want to refer to the two aspects of a situation or occurrence that might be related to each other. For example, you might say, "Exercising regularly has both an effect and an effectiveness on one's physical and mental health."
3) Assessing the effects and effectiveness of managed care on persons with severe and persistant mental illness in the public mental health system.
Training is widely advocated as the appropriate organisational response but the effects and effectiveness of training are inadequately studied.
The research evaluates the effects and effectiveness of a sodium chloride-based anti-icing filler on andesite and limestone asphalt mixtures.
But they might be used to monitor the effects, and effectiveness, of attempts to break whatever habits of mind it is that are bringing misery to the millions around the world for whom a little flutter becomes something far bigger.
Reforms and programs installed by policy must be seen as interventions and should generally be used to learn more about the effects and effectiveness of ECEC.
In case insurance companies try to communicate their CSR activities with their consumers, they are advised to include specific information in their CSR messages in order to maximize the marketer-intended effects and effectiveness.
As individuals' cultural backgrounds are important consumer factors influencing campaign effects and effectiveness (de Mooij 2010), previous studies suggests the relative advantages of culturally adapted messages over standardized or culturally non-adapted messages (Han & Shavitt 1994; Zhang & Gelb 1996).
When production of Aspirin began in 1899, Bayer sent out small packets of the drug to doctors, pharmacists and hospitals, advising them of Aspirin's uses and encouraging them to publish about the drug's effects and effectiveness.
Healthcare workers are required to provide the medication and to teach patients about and monitor both side effects and effectiveness of the ARVs.
