We map changes in the pattern of information disclosure by management to employees over 14 years in the UK, using the Workplace Employment Relations Survey (WERS) panels for 1990—8 and 1998—2004. We use time-lagged probit regression to explore antecedents and outcomes of disclosure over the two periods, focusing on the effects of voice mechanisms on disclosure and on the impact of disclosure on performance.The results show a significant increase in disclosure over the first period but a levelling off in the second. Neither union recognition nor direct participation had a significant impact on disclosure in either period. Joint consultation did, however, have a significant positive effect on disclosure, but more so in the first than in the second period. In addition, prior disclosure had a positive effect on subsequent disclosure. An explanation of trends in terms of lock-in and institutional decoupling is developed. Disclosure has a positive effect on financial performance
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