Logical empiricism and the Austrian School of economics are two of the internationally most influential intellectual movements with Viennese roots. By and large independently of each other, both have been subject to detailed historical and philosophical investigations for the last two dec-ades. However, in spite of numerous connections and interactions be-tween the two groups, their relationship has captured surprisingly sparse attention. My dissertation focuses on the many-faceted juxtaposition of two supposedly antagonistic championsof Viennese Late Enlightenment: logical empiricist Otto Neurath and (...) Austrian economist Ludwig Mises. I rationally reconstruct and critically compare their epistemological, meth-odological, and economic positions and demonstrate that a closer look reveals more compatibilities and similarities than acknowledged by the received view and by the protagonists themselves. Over and above the historiographic task of challenging and amending this received view, the analytic components of my thesis inform contemporary debates in phi-losophy, politics, economics, and other sciences. (shrink)