Model Uncertainty and the Crisis in Science

Abstract

The “crisis in science” today is rooted in genuine problems of model uncertainty and lack of transparency. Researchers estimate a large number of models in the course of their research but only publish a small number of preferred results. Authors have much influence on the results of an empirical study through their choices about model specification. I advance methods to quantify the influence of the author—or at least demonstrate the scope an author has to choose a preferred result. Multimodel analysis, combined with modern computational power, allows authors to present their preferred estimate alongside a distribution of estimates from many other plausible models. I demonstrate the method using new software and applied empirical examples. When evaluating research results, accounting for model uncertainty and model robustness is at least as important as statistical significance.