Blacks are less likely to graduate from college than whites with the same family income, but the gap disappears if you compare families with the same income and net worth.
收入相同的黑人和白人家庭中，黑人上大学的比例较低。但在家庭资产相当的家庭中比较，这一差距就不存在了。
For free-range farmers, the factors that affect their breeding pigs are net income, farmland size, the quantity of family labor.
而多数规模化养殖户仍然依据当期价格决定下一期的饲养数量，这也是造成生猪价格波动的主要原因。
For free-range farmers, the factors that affect their breeding pigs are net income, farmland size, the quantity of family labor.
而多数规模化养殖户仍然依据当期价格决定下一期的饲养数量，这也是造成生猪价格波动的主要原因。
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