Incumbent Rudy Giuliani, a Republican, will not be a candidate in this November's election because the city charter's new term limits prevent him from seeking a third term.

CNN: Michael Bloomberg eyes run at New York mayor

Mr. Klein's term was marked by aggressive moves to promote charter schools and make principals and teachers more accountable for performance.

WSJ: Schools Chancellor Klein Resigns, Joins News Corp.

But we should also take long-term steps to unlock those handcuffs and let charter schools choose the retirement plans that best suit their recruitment needs.

FORBES: Charter Schools, Pensions and Golden Handcuffs