The paper begins with a figurative representation of the contrast between present-day and formal applied econometrics. An explication of the status of bridge principles in applied econometrics follows. To illustrate the concepts used in the explication, the paper presents a simultaneous-equation...

Evaluating a new survey dataset of German consumers, we test whether individual consumption plans are formed according to an Euler equation derived from consumption life-cycle models. Estimating several consumption Euler equations, the results are mostly in line with the theory: We find evidence...

Linear programming model and general reciprocity theorem in mathematical programming are used to ap-proach utility functions of six large-scale Russian (the Moscow Region) case farms representing different production patterns. Technological coefficients of linear programmes are defined by means...