The primary driver of educational topics for specialties is the frequency at which an area of knowledge comes up in clinical practice of that specialty.
"In today's knowledge-driven economy, innovation is the primary driver of progress.
Yet the primary driver of the solar roofs is economic.
That is the primary driver of prices, according to the industry: records are expensive to manufacture.
European integration, in turn, has been the primary driver of Europe's economic revitalization.
"Mobile remains the primary driver of our growth," David Wehner, chief financial officer, told analysts.
"Right now, it's not the primary driver of why you buy the phone," he added.
We are, by now, used to seeing greed as the primary driver of corporate scandals.
"Do you really want taxes to be the primary driver of your investment decision?" she said.
He added that the "Economy Plus upsell was, once again, a primary driver of this growth".
Agriculture is a primary driver of landscape change (Houghton 1994).
