The dynamic linkages between the stock market prices of dual-class sha
res are investigated using Finnish data. It is discovered that the pri
ces of dual-class shares are co-integrated. The vector error correctio
n approach indicates long-term informational feedback from high-voting
A shares to low-voting B shares. It thus appears that B shares react
more slowly to new information than A shares. This information may be
useful when predicting the future returns of B shares.