The phrase "and more influential when" is correct and usable in written English.
It can be used to indicate a condition or situation in which something becomes more impactful or powerful.
Example: "The campaign was more effective and more influential when it targeted younger audiences."
Alternatives: "and more impactful when" or "and more powerful when".
Professional and personal factors were, in this case, relatively more influential: "When I came from Saudi Arabia, I was mostly expecting something that I can gain, like skills and knowledge" (ID28 Indian nurse with more than four years' experience in the United Kingdom and previous overseas experience assigned as a mentor to one of the Indian nurses).
Later, Rooney was more influential when he showed good movement – drifting back and forth, left and right, dragging his opponent into uncomfortable positions and getting in positions to receive passes on the half-turn.
This healthier lifestyle education will be more influential when done in the family, and then carried into the school cafeterias.
Poised with increased economic resources and prestige, migrants who maintain lively transnational ties are also likely to be more influential when it comes to politics.
The author Leslie Gelb acknowledges that his "Power Rules,"where he argued that G.D.P. matters more than military might, was more influential when reduced to articles.
For instance, scientists invoked ethical values (e.g., concerns about human welfare) when defining objectives, but epistemic values (e.g., concerns about model consistency) were more influential when evaluating model results.
Walter Charleton included Hobbes in his pantheon of illustrious sources, but Henry More seemed more influential when he criticized Hobbes for considering self-preservation the "highest wisdom" (1690, 62).
However, to move potential users from learning something new to changing their practices, interpersonal channels are often more influential when it comes to behavior (Borrego et al. [2010]; Rogers [2003]).
