Stephen Dubner interviews political scientist Yuen Yuen Ong about her research on corruption in China and the United States, based on her book "China's Gilded Age." Ong explains her four-part typology of corruption, how certain types of corruption can coexist with rapid economic growth, and why she believes the U.S. and China are both experiencing different versions of a "Gilded Age." She also critiques common corruption metrics, discusses China's evolving political-economic model under Mao, Deng, and Xi, and reflects on the strengths and weaknesses of capitalist prosperity and democracy.