The Onion's study (the image is Senate Majority Leader Mitch McConnell who is accused of changing his mind on when the Senate would vote to confirm a justice - I haven't analyzed that yer), I liked the Onion's study enough to quote the entire thing.
"Revealing that bald-faced lies and shameless double standards are the
most reliable way to outmaneuver one’s opponents, a report released
Wednesday confirmed that massive hypocrisy just flat-out gets the job
done. “Changing your stance based on temporary expediency has proven
time and again to be a slam dunk in terms of advancing an agenda,” read
the report, which went on to state that there are no major downsides to
doing one thing one year and doing the exact opposite the next because
the majority of people do not remember anything that happens in the
world for more than a week or so. “Whether you are engaged in a
carefully calculated strategy of dishonesty or just spouting the first
lie that comes into your head, hypocrisy works wonders. You will never
be held accountable and will instead be admired for your strength and
pragmatism as a leader. Evidence also suggests the only way to defeat a
hypocrite in power is to become an even bigger hypocrite yourself.” The
report went on to conclude that not only is brazen, amoral hypocrisy the
best way to enact your personal vision, it’s also fun."