The phrase "placebo tests" is correct and usable in written English.
It can be used when discussing medical or scientific studies that involve giving some participants a placebo (a fake treatment with no active ingredients) as a control group. An example sentence could be: "The researchers conducted placebo tests to determine the effectiveness of the new drug in comparison to the control group."
The placebo tests in columns (2) and (4) are insignificantly different from zero supporting such negative effects.
Appendix Table 11 provides another reason to be cautious about the Fifth Circuit results: the post-2009 and post-2011 placebo tests produce some positive, statistically significant estimates.
We then gauge the potential for selection effects overall to affect our analysis by considering the robustness of our results to an alternative measure of involuntary job loss which is also unexpected and by conducting placebo tests.
The zero coefficients on the dummy for youngest child turning seven, both here and in the competing risks estimates, can be interpreted as placebo tests: for those in the comparison group this has no impact on either the single risk hazard or the competing risks hazards.
Placebo tests can be a useful way to assess whether treatment effects are real or spurious, but in NSW, we argued that DLR's test was invalid because federal minimum wage changes across the border would also imply minimum wage changes in the state in question, so that the cross-border minimum wage assigned to placebo observations is contaminated with actual minimum wage variation.
To test the superiority of GFT505 over the placebo, tests were one sided.
The women who were least trusting anyway, as judged by the placebo test, were affected hardly at all by testosterone.
In a small 12-week randomized, double-blinded trial, researchers gave 29 normal weight postmenopausal women either 75 milligrams a day of resveratrol or a placebo, testing their metabolic function at the start and end of the study.
We also conduct a placebo test to support this conclusion.
That is, these results serve as a placebo test.
This analysis can be considered as a placebo test for our main estimates.
