@inbook{Ellwood2004, author = {Ellwood, D.T. and Jencks, C.}, title= {The uneven spread of single-parent families: What do we know? Where do we look for answers?}, year = {2004}, editor = {Neckerman, K.M.}, booktitle = {Social inequality}, address = {New York}, publisher = {Russell Sage}, pages = {3--77}, }