
+----------------------------------------+------------+
|                                        | (1)        |
+========================================+============+
| `factor(cyl)6`+`factor(cyl)6 × disp`=0 | -21.651*** |
+----------------------------------------+------------+
|                                        | (5.272)    |
+----------------------------------------+------------+
| `factor(cyl)8`+`factor(cyl)8 × disp`=0 | -18.724*** |
+----------------------------------------+------------+
|                                        | (4.587)    |
+========================================+============+
| + p < 0.1, * p < 0.05, ** p < 0.01, *** p < 0.001   |
+========================================+============+ 
