indicates causality by showing that one thing leads to a result

to describe how actions, policies, events, or substances produce observable outcomes

when discussing scientific experiments, policy impacts, health effects, market changes, etc.

academic writing, professional reports, technical discussions, everyday conversation about consequences

have an effect on

have an effect on

dramatic/immediate effect on outcome/person; may be replaced by synonyms like 'affect' or 'influence' in informal speech

• adverse
• beneficial
• profound
• noticeable
• have the desired effect on

• affect (verb)
• influence
• impact on
• note that these are often used interchangeably but differ slightly in nuance

using *make an effect on instead of *have an effect on; confusing with noun form 'effect' which refers to a result rather than causation

have an impact on, affect, influence – all convey influence but vary by register and specificity

English speakers from L1s using 'affect' as verb may misuse it here; be mindful of the idiomatic distinction between 'affect' (verb) vs. 'effect' (noun)

• affect
• influence
• shape
• determine

'Have an effect on' is neutral in tone and emphasizes cause-and-consequence relationship, whereas phrases like 'take effect' signal initiation or operationalization

Used to provide factual explanations, justify decisions, evaluate consequences, and inform stakeholders about expected outcomes

The drug had an immediate effect on his symptoms

The chunk 'have an effect on something/someone' is a common and versatile phrase used to describe the influence or impact one thing has on another. It is widely used in various contexts, from academic settings to everyday conversations, to explain how actions, decisions, or events lead to observable outcomes

use 'exert an effect on' in academic prose