"effectively deter" is correct and can be used in written English.
For example, "The adult education course was designed to effectively deter students from dropping out."
To effectively deter, it had to be credible.
But the truth is that no amount of cautious editing can effectively deter those with rigid ideological dispositions.
Nor does anybody know what level of taxation will most effectively deter consumption without encouraging a black market.
The police often believe that shows of force effectively deter youth from crime and enhance respect for police officers.
He said it would fail to "effectively deter the Assad regime – they can use artillery, they can use helicopter gunships".
The project aims to detect and effectively deter human rights crimes in Sudan by monitoring the war-torn country's borders and keeping tabs on potential hot spots.
Those who can be officially pilloried or punished for having a particular philosphic or political creed are effectively deterred from exercising First Amendment rights.
But surely bribery, not to mention other forms of corporate wrongdoing, would be more effectively deterred if someone was actually held accountable for it.
President Trump has mused in recent months about reviving the practice, saying he believed it effectively deterred people from crossing the border illegally.
Senior White House officials said the American military response effectively deterred the Iranians and slowed the rocket attacks that were killing U.S. soldiers and Marines.
If the MMoU arrangement effectively deters informed trading and exploitation of uninformed shareholders as it is intended to do bid-ask spreado bid-asknarrow (indicating reduced perceptionspreadsshouldd lower tranarrowon costs).
