1. Job characteristics and hours of work;Altonji;Research in Labor Economics,1985
2. Large sample properties of generalized method of moments estimators;Hansen;Econometrica,1982
3. Panel data and unobservable individual effects;Hausman;Econometrica,1981
4. Implementing causality tests with panel data, with an example from local public finance;Holtz-Eakin;National Bureau of Economics technical working paper no. 48,1985