A brief article covering 'concessionary bargaining', released for online review:How to Bargain Concessions (If You Must) | Labor Notes

....In the Teamsters, one of the largest less-than-truckload carriers, Yellow/Roadway, stopped paying pensions and cut wages 15 percent. Jobs were being lost. Through concessions bargaining, YRC was preserved, along with 35,000 jobs out of perhaps 42,000. The union ousted the CEO and audits and financial controls were put in place.
Not as good as the lecture I heard him (the author, a staff member of my Local) give on this subject several years ago, but it's a quick read and I recommend it for all you YRCW Teamsters and anyone else whose employer is demanding givebacks.