Answered You can hire a professional tutor to get the answer.
"Wage differentials are a result of productivity differentials: that is, marriage per se makes workers more productive.
"Wage differentials are a result of productivity differentials: that is, marriage per se
makes workers more productive. In fact data shows that 70% of male workers in the 95th
percentile of the productivity distribution are married"
x问一下这题什么思路