The phrase "a positive side effect" is correct and usable in written English.
It can be used when discussing an unintended beneficial outcome resulting from an action or decision.
Example: "While the new policy aimed to reduce costs, it also had a positive side effect of improving employee morale."
Alternatives: "a beneficial outcome" or "a favorable consequence".
The NSA's secretive nature also brings a positive side effect in striking a work-life balance.
And a positive side effect will be a higher page-rank for these sites, because of deep links.
I also think that the chronicle is a positive side effect of the struggles faced by Brazilian writers.
"I treat them because of their wrinkles, and if the headaches get better, that's a positive side effect.
Further, term limits, although not designed to promote the election of women, have a positive side effect for women's representation.
Cultivation of herbaceous energy crops would help to keep an open landscape as a positive side effect of bioenergy production and the lowland rental costs of abandoned farmland would positively improve the economy of energy grass cultivation.
Even the lack of racing experience has a positive side-effect.
A positive side-effect of the thinner crowds, however, has been to render the course less taxing on punters.
This is not to say that empathy doesn't have a place in intergroup relations in the presence of intergroup contact and friendship, for example, research suggests that a positive side-effect is empathy towards out-groups.
It has to be said, it seems a little improbable that West is motivated by altruism, but there's certainly a positive side-effect of his behavior for everyone else.
A positive side-effect of a change of policy would be that more parents can learn directly from mothers they know personally about "what breastfeeding looks like" and that women and their partners with least experience of breastfeeding have more opportunity to see their friends' pictures on the internet.
