The phrase "a substantive effect on" is correct and usable in written English.
It can be used when discussing the significant impact or influence that something has on a particular situation or outcome.
Example: "The new policy is expected to have a substantive effect on employee productivity and morale."
Alternatives: "a significant impact on" or "a meaningful influence on".
And that intimacy has had, I think, a substantive effect on the peace process and how it's being conducted.
In societies where insurance is not a norm, this instantly impoverishes families, and the knock-on effect has a substantive effect on national GDP.
Of course, Cahill's goal, while it decorated the World Cup, didn't in the end have a substantive effect on Australia's World Cup campaign, as they were eliminated without being disgraced.
Weights have a substantive effect on overall MJH rates and, to a lesser extent, some of our other variables.
Yet amid all this fluff and puffery, Trump has issued a few orders that have had or will soon have a substantive effect on the country.
Increasing the stakes in the UG does not have a substantive effect on DM1 offers or DM2 punishment thresholds [51].
The effect size was ES =.20, showing a substantive effect of PTH on BMD in terms of criteria propounded by [ 19] and [ 20].
Magnesium sulphate reduces the risk of eclampsia [ 8] without any substantive effect on longer term morbidity and mortality for the women or children [ 9, 10].
Participants will be randomly allocated to an intervention group that engages in practice on using a 'challenging' version of the Stroop task for the duration of the intervention while participants allocated to the comparison group will engage in regular practice on an 'easy' version of the task that is not proposed to have any substantive effect on training self-control.
The evidence for the benefit of treating populations with schistosomiasis is fairly clear (Danso-Appiah 2008), as the infection has a very substantive effect on health.
Adjusting for all other individual-level characteristics, neighbourhood affluence and geographical remoteness (Model 3) had a more substantive effect on the ethnic differences (OR=3.67 to 2.11 for the Lebanese born in Lebanon; OR=2.30 to 1.84 for the Croatians born in Croatia).
