The 35 hour workers are also getting fewer hours now.
35 hours x $15 x 4 weeks x 3 months = $6300/qtr (gross)
35 hours x $11 x 4 weeks x 3 months = $4620/qtr
They should be making $1632 more per qtr -- but they are only making $251 more per qtr.
But wait, we all made a little more money more during this time. There was inflation. Does the study adjust for inflation? The answer seems to be no; I can't find any evidence that all this is in real dollars. $4,620 in June 2014 is equivalent in purchasing power to $4,902 in October 2018. That's $282 difference.
So the math says the top half people are now working 2 fewer hours per week, and netting a little
less money out of their job due to inflation.