"large positive effects" is a correct and usable phrase in written English.
It can be used as a noun phrase to describe the impact or results of something, typically in a positive way. Example: The implementation of the new recycling program had large positive effects on the environment, reducing waste and promoting sustainability.
They find large positive effects of the meetings.
Sarvimäki and Hämäläinen (2010) find large positive effects on employment and earnings of a programme for immigrants consisting of a sequence of training and subsidized employment in Finland.
On the other hand, existing literature reveals that on-the-job training programs have large positive effects on employment outcomes, especially when they are well-targeted (Additional file 1: Table A1).
Generating an answer compared to just reading it has large positive effects on long-term retention of that material, an effect known as the generation effect (Bertsch, Pesta, Wiscott, & McDaniel, 2007; Slamecka & Graf, 1978).
However, we find negative effects for economics and accounting and especially large positive effects on marketing and management (probably the least technical business majors), which is contrary to the premise.
If some programmes show positive effects, further targeting of such programmes to immigrants may have large positive effects on labour market integration and, indirectly, on social integration in general.
When the researchers presented to their subjects a slide showing that the estate tax currently affects only about 0.1percentnt of estates — the very richest ones — they found that this knowledge "has an extremely large positive effect on estate tax support, even increasing respondents' willingness to write to their U.S. senator about the issue".
However, a large positive effect for TC-born even in the final model.
Among these significant factors only calcium chloride showed a large positive effect on 4-CP biodegradation by the microorganism.
Organic farming, however, has a large positive effect on biodiversity with plants benefiting the most among taxonomic groups [122].
This indicates that the class average increased by almost 1.5 standard deviations, which is considered a large positive effect.
