Flawyer,
Yes, this is more or less what would be expected. Also, with a larger market for the specific skills, there could be a reduction in variability over time of employment and perhaps wages. Greater competition might reduce the gap between the highest wages and the industry median. If there is a shake-out of 'straggler firms' at the start of liberalisation, it might also mean a reduction in the gap between median wages and the lowest. But this is just speculation.
Could you please expand on:
'The situation within the US domestic market reduces the impact of liberalisation on the US industry.'
answer=42