This paper provides an empirical evaluation of the effects of Spanish
sectoral collective bargaining on wages. For this purpose, we use a sa
mple of workers for whom bargained wage rates and earnings are availab
le. Using a variant of the Meyer and wise approach, we are able to est
imate wage gains due to minimum bargained wages and their employment e
ffects. The most relevant conclusion is that there is evidence of a 's
word of justice' effect by unions, but this is limited by non-complian
ce among unskilled workers and the non-binding nature of bargained wag
es for skilled workers. (C) 1997 Elsevier Science B.V.