The theoretical contribution to economics of the prominent scientists was investigated and described: one of the founders of regional economics school academician A.I. Tatarkin, one of the fathers of the Soviet gold chervonets and authors of the monetary reform of 1922-1924. V.V. Tarnovsky, one of the founders of financial science in Tsarist Russia V.N. Tverdokhlebov, striking economist and financier L.V. Tengoborsky, famous sociologist G. Tarde, American marginalist F. Taussig.