The phrase "a concrete effect" is correct and usable in written English.
It can be used when discussing a specific, tangible outcome or result of an action or event.
Example: "The new policy had a concrete effect on employee productivity, leading to a noticeable increase in output."
Alternatives: "a tangible impact" or "a definite result".
The HD broadcasts have had a concrete effect on one area: acting.
"But they are also to take the momentum gathered around the movie and direct it towards activities that will have a concrete effect on the election".
Whether or not the power outage had a concrete effect on the playing field, it was still the most memorable event of the evening.
And the reporting has been thorough, veracious and enlightening — the stories told by the news media have had a concrete effect on how people perceive our continuously evolving digital realities.
Hardly; rather like the mass switch-offs that WWF and other environmental groups have mounted in recent years, it's intended to be as much about awareness as about a concrete effect.
The research was an attempt to determine a concrete effect of bots on the 2016 presidential election and Brexit vote.
But it was not clear that it would have any concrete effect on the fighting.
Every year for two decades, Congress has debated most favored nation status for China and has often sought to link renewal to human rights, but there is no evidence that these debates have had any concrete effect.
The second patient BG is a phonological dyslexic who, although displaying a strong concreteness effect (concrete words read better than abstract words), was able to read functors individually perfectly well, a pattern that is rarely if ever seen.
What makes the Brady list and the Brady cop designation so damaging to officers, beyond the opprobrium of being called a liar, is the concrete effect it has on officers' careers.
Howling and yowling aside, though, there would likely also be an interesting (and more concrete) effect should Obama win his second term in this fashion -- Republicans would suddenly discover an effort which has been quietly building steam ever since the 2000 election.
