The phrase "serve as a reason" is correct and usable in written English.
You can use it when you want to indicate that something is a justification for an action, opinion, or decision. For example: "The fact that he was late for work on multiple occasions served as a reason for his termination."
Maybe even more, since this could serve as a reason to charge higher interest rates to utilities.
Though the new drilling methods are often characterised by these local risks, these alone are unlikely to serve as a reason not to pursue them.
If Ms Suu Kyi's group reaches an accommodation with the government, it could serve as a reason for Western nations to lift political and economic embargoes on the country which have hindered development and pushed it into dependence on neighbouring China.
It was because Stalin, despite the self-evident facts, thought that the war had not yet started, that this was only a provocative action on the part of several undisciplined sections of the German army, and that our reaction might serve as a reason for the Germans to begin the war.
For reporters, these cases should serve as a reason to keep a close watch on the WikiLeaks investigations, and others like it: what happens to alternative media may seem remote, and the outlets and their ethical standards might not meet your tastes (Assange's have certainly not always met mine), but the gulf between them and you is far narrower than it might seem.
Venus was the one flexing her shoulder after strolling over to chat with Serena while they waited for the postmatch ceremonial proceedings, but unwilling to later use what Serena called "a tired arm" and a tepid serve as a reason she lost.
A federal judge approved a plan on Wednesday intended to lift a longstanding desegregation order that has served as a reason and an excuse for a lot that has gone wrong in the district over the past decades: shrinking enrollment, sliding graduation rates and insistent dropout rates.
September 24, 2013 Updated at 10.00pm BST 9.15pm BST The Times correspondent in Tehran provides a little context for this: Thomas Erdbrink (@ThomasErdbrink) For decades, when Iranian diplomats need to avoid complicated dinner seating arrangements, they cite alcohol served as a reason to cancel.
Thus, the student's belief about the length serves as a reason for her belief about the period.
Close relationship between OFP and headache complicates their cause and effect definition and often serves as a reason to classify these pain syndromes together [3].
This function has often served as a reason to demote the artistry involved in advertising, and the too-close relation to literature has been seen as a threat to the latter's greatness.
