Yes, studies have shown that these campaigns are very effective.
Cigarettes, cigars, cigarrillos, chewing tobacco, nicotene injection patches, and half-hearted, sarcastic, Laramie-promoting antismoking posters.
Edith Falk has written: 'Smoking control in Australia since 1975' -- subject(s): Antismoking movement, Bibliography, Health aspects of Smoking, Smoking
A cigarette company's agenda also includes profiting from the sale of cigarettes.
it means effective
Both "effective in" and "effective at" can be correct, depending on the context. Use "effective in" when referring to a specific area or situation where something is effective. Use "effective at" when referring to a specific task or action at which something is effective.
more effective, most effective
What are benefits of effective communication What are benefits of effective communication
We can get effective power through proper planning and with effective management.
The suffix to "effective" is "-ive."
yes they are effective
yes it was effective
It still is effective.