QUOTE : Traditionally, young Chinese couples moved in with the groom’s parents, but by the twenty-first century less than half of them stayed very long, and the economists Shang-Jin Wei and Xiaobo Zhang discovered that parents with sons were building ever larger and more expensive houses for their offspring, to attract better matches—a real estate phenomenon that became known as the “mother-in-law syndrome.” Newspapers encouraged it with headlines such as A HOUSE IS MAN’S DIGNITY. In some villages, a real estate arms race began, as families sought to outdo one another by building extra floors, which sat empty until they could afford to furnish them. Between 2003 and 2011, home prices in Beijing, Shanghai, and other big cities rose by up to 800 percent.