1. Selection of Regressors
2. Cox, David Roxbee, and D. Oakes, Analysis of Survival Data (New York: Chapman and Hall, 1984).
3. Davidson, Russell, and James MacKinnon, Estimation and Inference in Econometrics (New York, NY; Oxford, UK: Oxford University Press, 1993).
4. Engelhardt, Gary, "Housing Leverage and Household Mobility," Dartmouth College, mimeo, 1998.