individuals of one skill type, say "scientists," confer a positive externality on overall productivity whereas individuals of the … effect on the productivity of the country's workforce. Under a quota: the migrants are (a) only averagely skilled managers if … the productivity externality generated by the scientists is weak, or (b) only averagely skilled scientists if the …

individuals of one skill type, say "scientists," confer a positive externality on overall productivity whereas individuals of the … effect on the productivity of the country’s workforce. Under a quota: the migrants are (a) only averagely skilled managers if … the productivity externality generated by the scientists is weak, or (b) only averagely skilled scientists if the …

individuals of one skill type, say “scientists,” confer a positive externality on overall productivity whereas individuals of the … effect on the productivity of the country's workforce. Under a quota: the migrants are (a) only averagely skilled managers if … the productivity externality generated by the scientists is weak, or (b) only averagely skilled scientists if the …