EN
The article presents an expertise on the implementation of the project “Trendy rozwojowe Mazowsza” (Developmental Trends of Mazovia)22, within a framework of econometric causal-effect methodology. Notes and conclusions formulated in the paper may prove useful whole elaborating developmental projects for other Polish regions. The article shows plausible strategies of regional modeling, suggests heuristic procedures of estimation/calibration of structural parameters of regional relationships under low number of observations, and presents an outline of a regional model for Mazovia which incorporates numerous leading themes envisaged in the project. Moreover, the paper reports answers to vital questions on modeling socio-economic development of Mazovia, raised by Mazowieckie Biuro Planowania Regionalnego (Mazovian Bureau for Regional Planning).