Paper  bibtex   

@article{roodman_how_2006,
	title = {How to do xtabond2: {An} introduction to difference and system {GMM} in {Stata}},
	shorttitle = {How to do xtabond2},
	url = {http://papers.ssrn.com/sol3/papers.cfm?abstract_id=982943},
	number = {103},
	urldate = {2013-10-31TZ},
	journal = {Center for Global Development working paper},
	author = {Roodman, David},
	year = {2006}
}