A "robustness test" is a way to check how well something performs under different conditions or challenges. It helps determine if something is strong, reliable, or can withstand various changes or impacts. Full definition
They focus on monthly measurements, but test the daily series in robustness test. (cxoadvisory.com)
And we present a large number of robustness tests addressing alternative model specifications (in the text and the on - line appendices)! (blog.politics.ox.ac.uk)
They also use bootstrapping as an additional robustness test. (cxoadvisory.com)