Acknowledgements. Introduction. How Do the Construction and/or Interpretation of Models Affect Our Decisions? Uses of modeling in science and society (J. Allison et al.). An epistemological view of decision aid technology with emphasis on expert systems (H.D. Carrier, W.A. Wallace). Models in the public sector: success, failure, and ethical behavior (J.M. Mulvey). How Do Values Become Incorporated in Models? Rhetoric and rigor in macroeconomic models: populist and orthodox swings in Latin America (P.D. McNelis). Ethical and modeling considerations in correcting the results of the 1990 decennial census (S.E. Fienberg). The role of models in managerial decision making, never say the model says (V.P. Barabba). What Are the Ethical Responsibilities of Model Builders? From model building to risk management: evolving standards of professional responsibility (N.P. Ross, S. Harris). On model building (J.D.C. Little). Morality and models (R.O. Mason). One-sided practice, can we do better? (J. Rosenhead). Where Do We Go from Here? Ethical concerns and ethical answers (S.I. Gass). Responsible policy modeling (W.E. Walker). Society's role in the ethics of modeling (E.H. Leet, W.A. Wallace). Appendix A: Authors. Appendix B: Ethics in Modeling Workshop agenda. Appendix C: Ethics in Modeling Workshop Participants. Author Index. Subject Index.