TY - JOUR AU - Imberman,Scott AU - Kugler,Adriana D. AU - Sacerdote,Bruce TI - Katrina's Children: Evidence on the Structure of Peer Effects from Hurricane Evacuees JF - National Bureau of Economic Research Working Paper Series VL - No. 15291 PY - 2009 Y2 - August 2009 UR - http://www.nber.org/papers/w15291 L1 - http://www.nber.org/papers/w15291.pdf N1 - Author contact info: Scott A. Imberman Department of Economics University of Houston 204 McElhinney Hall Houston, TX 77204 Tel: 713/743-3839 Fax: 713/743-3798 E-Mail: simberman@uh.edu Adriana D. Kugler Georgetown University Georgetown Public Policy Institute 37th and O Streets NW, Suite 311 Washington, DC 20057 Tel: 202/687-5716 Fax: 202/687-5544 E-Mail: ak659@georgetown.edu Bruce Sacerdote 6106 Rockefeller Hall Department of Economics Dartmouth College Hanover, NH 03755-3514 Tel: 603/646-2121 Fax: 603/646-2122 E-Mail: Bruce.I.Sacerdote@dartmouth.edu AB - In 2005, hurricanes Katrina and Rita forced many children to relocate across the Southeast. While schools quickly enrolled evacuees, receiving families worried about the impact of evacuees on non-evacuee students. Data from Houston and Louisiana show that, on average, the influx of evacuees moderately reduced elementary math test scores in Houston. We reject linear-in-means models of peer effects and find evidence of a highly non-linear but monotonic model - student achievement improves with high ability and worsens with low ability peers. Moreover, exposure to undisciplined evacuees increased native absenteeism and disciplinary problems, supporting a "bad apple" model in behavior. ER -