Becker usedmarket analysis to tackle the questions of whom, when and why we marry.
Becker利用市场分析来解决我们和谁，何时和为什么结婚的问题。
2
Because it's all digital, it eliminates the used book market and eliminates any sharing, and because homework and tests are through an access code, it eliminates any ability to opt out.
But because it's all digital, it eliminates the used book market and eliminates any sharing, and because homework and tests are through an access code, it eliminates any ability to opt out.