The impact of privatization is investigated in a shirking model of eff
iciency wages. Without trade unions, privatization - modeled as a stri
cter control of employees - lowers wages and raises employment, output
, and profits, while effort and productivity effects depend on the emp
loyees' risk aversion. However, for a utilitarian monopoly union, faci
ng a company characterized by a constant-elasticity labor-demand sched
ule, privatization raises efficiency wages. If privatization is modele
d as a stronger profit orientation, wages, effort, and labor productiv
ity will rise, while employment will shrink in a wage-setting firm. Ag
ain, wage and employment effects can be reversed in the case of wage n
egotiations.