Chaison's research focus has been on union mergers and the impact these have on union viability, union democracy, and perceptions of legitimacy.

In this work, Chaison turned his attention to the effectiveness of union mergers.

The question of legitimacy flowed from Chaison's prior examination of union mergers.

He sees the union merger, combining massive resources, as a way of attracting more members.

Members of four railroad unions voted overwhelmingly for the largest union merger ever in the railroad industry.

In his first two terms in office, Gerard oversaw in a significant number of union mergers with the USW.

But neither the union leadership nor corporate America view the union mergers as sufficient by themselves to challenge the hegemony that management now exercises over labor.

For each successfully negotiated union merger, there are at least two that failed because members rejected them when they thought more would be lost than gained.

It's the biggest union merger in history.

He would like to encourage union mergers and better settle disputes between unions trying to organize the same workers.