
-----------------------------------------------------------
                       grp1                    grp2        
              ---------------------   ---------------------
              SepalWidth       SepalLength       SepalWidth
              ----------   -------------------   ----------
                     (1)        (2)        (3)          (4)
-----------------------------------------------------------
SepalLength       -0.313                           0.378***
                 (0.239)                            (0.066)
PetalLength      1.048**              0.776***      -0.188*
                 (0.362)               (0.064)      (0.083)
(Intercept)                6.526***                        
                            (0.479)                        
SepalWidth                   -0.223   0.432***             
                            (0.155)    (0.081)             
PetalWidth                                         0.626***
                                                    (0.123)
-----------------------------------------------------------
Species              Yes                   Yes          Yes
-----------------------------------------------------------
Estimator             IV        OLS        OLS          OLS
-----------------------------------------------------------
N                    150        150        150          150
R2                 0.080      0.014      0.863        0.635
-----------------------------------------------------------

