Parameter space for the ejection efficiency ξ, the magnetization μ, the jet power parameter b and the sonic Mach number m_s for the accretion-ejection solutions of Ferreira (1997) used in this paper. The lines correspond to different values of the disc aspect ratio H/R: solid lines: H/R = 0.1, dashed lines: H/R = 0.01, dot-dashed lines: H/R = 0.001. For this set of solutions, the turbulence level parameter α_m is taken equal to unity.