Paserman, Marco Daniele - 2008
could
not investigate directly the effect of immigrants on plant productivity. To my knowledge,
Quispe-Agnoli and Zavodny … where there can be knowledge spillovers. This
conjecture is soundly rejected: the quadratic term is always small and … conjecture is that the effect of immigrants varies by firm size.
Again, this could be because knowledge spillovers can occur …