Assessing Sector-Wide Programs with Statistical Impact Evaluation: a Methodological Proposal Chris Elbers i , Jan Willem Gunning ii and Kobus de Hoop iii January 2008 forthcoming in World Development i Chris Elbers, VU University Amsterdam, Faculty of Economics and Business Administration, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands, phone +31 20 5986143, fax +31 20 5986004, e- mail: celbers@feweb.vu.nl ii Jan Willem Gunning, VU University Amsterdam, Faculty of Economics and Business Administration, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands, phone +31 20 598 6141, fax +31 20 5986004, e- mail: jgunning@feweb.vu.nl iii Kobus de Hoop, VU University Amsterdam, Faculty of Economics and Business Administration, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands, phone +31 20 5986145, fax +31 20 5986004, e- mail: jhoop@feweb.vu.nl All three authors are affiliated with the Tinbergen Institute and the Amsterdam Institute for International Development.