Millions of Americans are facing "a shocking level" of income and expense volatility - much like what's experienced in emerging markets. That's the key finding of a new book by Rachel Schneider, Senior Vice President at CFSI, and Jonathan Morduch of New York University. Called "The Financial Diaries, How American Families Cope in a World of Uncertainty," the book presents insights gained from tracking the financial lives of 235 low and moderate income households for a full year, exploring in remarkable detail the ways they deal with financial insecurity. Schneider discusses the research and its implications for America's economic, social and political future in this wide-ranging interview.