This is a subset of the data used in Perry and Rosen (2004).
References
Perry, C. and Rosen, H.S. (2004). The Self-Employed are Less Likely than
Wage-Earners to Have Health Insurance. So What? in
Holtz-Eakin, D. and Rosen, H.S. (eds.), Entrepeneurship and
Public Policy, MIT Press.
Stock, J.H. and Watson, M.W. (2007). Introduction to Econometrics, 2nd ed. Boston: Addison Wesley.