Into the early 2000s, Bueno de Mesquita was known for his development of an
expected utility model (EUM), an operationalized application of the expected utility hypothesis from
mathematical economics. The model has been successful in predicting the outcome of many political events over a unidimensional policy space. His EUM used
Duncan Black's
median voter theorem to calculate the median voter position of an N-player bargaining game and solved for the median voter position as the outcome of several bargaining rounds using other ad-hoc components in the process. The first implementation of the EUM was used to successfully predict the successor of Indian Prime Minister Y. B. Chavan after his government collapsed (this was additionally the first known time the model was tested). Bueno de Mesquita's model not only correctly predicted that Charan Singh would become prime minister (a prediction that few experts in Indian politics at the time predicted) but also that Y. B. Chavan would be in Singh's cabinet, that Indira Gandhi would briefly support Chavan's government, and that the government would soon collapse (all events that did occur). From the early success of his model, Bueno de Mesquita began a long and continuing career of consulting using refined implementations of his forecasting model. A declassified assessment by the Central Intelligence Agency rated his model as being 90 percent accurate. Since 2005 or so, Bueno de Mesquita developed a superior model, now known as the Predictioneer's Game or PG that forecasts in a multi-dimensional space, uses the Schofield mean voter theorem, and solves for
Perfect Bayesian Equilibrium in an N-player bargaining game that includes the possibility of coercion, essentially a greatly generalized version of the two-player game in
War and Reason. This model predicts significantly more accurately and does a substantially better job of identifying opportunities that players have to improve the outcome by exploiting uncertainties. The model is documented in
A New Model for Predicting Policy Choices: Preliminary Tests, and discussed and applied to examples in ''The Predictioneer's Game''. Bueno de Mesquita's forecasting model have greatly contributed to the study of political events using forecasting methods, especially through his numerous papers that document elements of his models and predictions. Bueno de Mesquita has published dozens of forecasts in academic journals. The entirety of his models have never been released to the general public. ==Publications==