The U.S. Department of Homeland Security are sponsoring this conference in upstate N.Y. over June 23-26 via the National Consortium for the Study on Terrorism and Responses to Terrorism (START) and the National Center for Risk and Economic Analysis of Terrorism Events (CREATE). For more information, see the Conferences page for the Conflict and Terrorism Forecasting special interest group, here.

Use your judgment to forecast 20 quarterly time series in a forecasting experiment. You will be helping science and, if your forecasts are among the most accurate, win a £20 Amazon Gift Card. For details

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The ISF2013 Organizing Committee has extended the early registration deadline for the International Symposium on Forecasting in Seoul to 31 May. For details and to register, see here

Theoretical and empirical papers in forecasting are invited for OR55 in Exeter, U.K., from the 3rd to 5th of September 2013. OR55 is the main conference of the OR Society. It typically attracts more than 300 delegate from around the world. Read on for the full Call for Papers...

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Thanks to a number of you who provided good descriptions of the problems, Simon Galperin, the original programmer of the Delphi program, along with help from the IT Department at The Wharton School, has repaired the program.

Principle of the day:

8.4-Provide numerical scales with several categories for experts\' answers

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The Forecasting Principles site summarizes all useful knowledge about forecasting so that it can be used by researchers, practitioners, and educators. The site is devoted to improving decision making by furthering scientific forecasting.