even though the employmenttopopulation ratio of the foreignbom population was lower than that of nativebom population the share of the foreignbom population of working age was much higher than the corresponding nativebom share the resulting share of employment in the total population is therefore higher for foreignbom population than for the ghanaianbom population the upward effect of this gap of percentage points on the national share of employed is unlikely to be wiped out by the potentially negative impact of the presence of foreignbom workers on the nativebom employment rate the effect of immigration on the capitallabour ratio is not known and the overall effect of migrant labour on gdp per capita therefore cannot be ascertained with great accuracy