Based on “the crash confidence index,†a measurement developed by economist Robert Shiller that analyzes how confident people are that there won’t be a stock market upset, the Couples Confidence Index assesses the state of your marriage. Create a baseline index and answer a set number of questions (as outlined in Spousonomics). Six months later, ask yourself the same questions. Have things improved or gotten worse? You should be able to anticipate how things are heading before things reach an extreme.