@Article{DLW:Unfunded:2010,
    author = {Troy Davig and Eric M. Leeper and Todd B. Walker},
    title = {``{U}nfunded liabilities'' and uncertain fiscal financing},
    journal = {Journal of Monetary Economics},
    year = {2010},
    volume = {57},
    number = {5},
    pages = {600--619}
}