Sample sizes	Normal Exogenous Variables		Uniform Exogenous Variables
Sample sizes	Exact	Over	Exact	Over
10	OLS	OLS	OLS	OLS
20	OLS	OLS	OLS	OLS
30	OLS	2SLS	OLS	OLS
50	OLS	3SLS\2SLS	OLS	OLS
100	OLS\2SLS\3SLS	2SLS\FIML	OLS	OLS
250	2SLS\3SLS	FIML	OLS	2SLS
500	2SLS	FIML\2SLS	OLS	3SLS\2SLS