"upward impact" is a correct and usable phrase in written English.
You can use it when referring to the positive effect of something on a particular outcome or result. For example: "The introduction of new technology had an upward impact on manufacturing speed."
Howard Archer, chief UK economist at IHS Global Insight, increased his forecast for growth in 2015 from 5% to 6% "partly due to the increased upward impact on prices coming from a lack of properties on the market".
What's more, he claimed on Twitter last week, the fight over Brett M. Kavanaugh's nomination to the Supreme Court was "having an incredible upward impact on voters". Republicans not motivated by concerns about the apocalypse that would result from Democrats having slight majorities on Capitol Hill were instead motivated by the Democrats' efforts to block Kavanaugh's confirmation.
Air fares fell 18.7% in the year to September, the ONS said, but this was smaller than the 25.2% decrease seen a year ago and so had an upward impact on the inflation rate.
President Donald Trump has been pushing that narrative, tweeting: "The harsh and unfair treatment of Judge Brett Kavanaugh is having an incredible upward impact on voters.
In essence the ball was positioned opposite the leading foot when using a driver club to promote an upward impact and trajectory.
Our results indicate downward as well as upward impacts of applying a grouped rank variable as compared to a continuous variable.
The hike, as it turn out, could affect more than a third of the labor force, primarily because Los Angeles has so many low-wage workers and because increases at the bottom have a "ripple effect" upward that impacts those higher up in the wage distribution.
2018 S&P 500 Index earnings forecasts have been trending upward, reflecting the impact of the tax reform legislation, and currently are estimated at around $145.
Simulation results show that the ARM machine cushion with cylinders guided vertically upward has the best impact suppression capability.
Here, book value is adjusted upward to reflect the impact of inflation on the replacement costs of property, plant and equipment.
Since multilateral resistance to migration generates an upward bias on the impact of the origin country unemployment to inflows, estimates decreased slightly under the specification with auxiliary regressions, where the decrease of inflows associated to an increase of 10 pp in the unemployment rate is only of 0.1 pp.
