Bandick, Roger; Görg, Holger - 2009
horizontal or vertical. This has, to the best of our
2
knowledge, not been investigated in earlier studies.
6
Finally, our … alternative instrumental variables are reported in columns (ii) to
(iv). Unfortunately there is, to the best of our knowledge … to some extent shown in the IV generating probit in Table 5, there is, to
the best of our knowledge, no test of …