This paper examines the connection between the business cycle, non-lin
earities and asymmetries in the UK labour market. The economy is shown
to display cyclical asymmetries; stochastic properties of variables s
uch as employment, unemployment, real wages and the unemployment-vacan
cy ratio crucially depend upon the state of the business cycle. We sho
w that in most cases conditioning on the state of the cycle removes re
sidual non-linearities and is more successful than the linear and a nu
mber of non-linear time-series models. The robustness of our findings
is confirmed using a variety of diagnostics and alternative measures o
f the cycle.