@article{Piehl2003,
author = {Piehl, A.M. and Cooper, S.J. and Braga, A.A. and Kennedy, D.M.},
title= {Testing for structural breaks in the evaluation of programs},
year = {2003},
doi = {10.1162/003465303322369713},
volume = {85},
number = {3},
pages = {550--558},
}