The dislike of econometricians for a priori  criticism of hypotheses is more personal. They just have  to believe that the hypotheses are testable, for if not, they have nothing to test. 
Robert Kelm
Kurs złoty/euro: teoria i empiria
Wydawnictwo Uniwersytetu Łódzkiego, Łódź, 2013, 978-83-7525-821-9
Władysław Welfe
Macroeconometric Models
Springer, ., 2013, .
Piotr Karp, Piotr Kębłowski, Michał Majsterek, Aleksander Welfe
Analiza kointegracyjna w makromodelowaniu
PWE, Warszawa, 2013, 978-83-208-2039-3
Aleksander Welfe (ed.)
New Directions in Macromodelling
ELSEVIER, Amsterdam, 2004, 0-444-51633-6
Władysław Welfe
Long-term macroeconomic models. The case of Poland
Economic Modelling, Vol. 28, 2011, pp. 741-753
Anna Staszewska-Bystrova, Peter Winker
Constructing narrowest pathwise bootstrap prediction bands using threshold accepting
International Journal of Forecasting, Vol. 29, 2013, pp. 221-233
Piotr Kębłowski, Aleksander Welfe
A risk-driven approach to exchange-rate modelling
Economic Modelling, Vol. 29, 2012, pp. 1473-1482
Wojciech Grabowski, Aleksander Welfe
Global stability of dynamic models
Economic Modelling, Vol. 28, 2010, pp.782-784
Anna Staszewska-Bystrova
Bootstrap prediction bands for forecast paths from vector autoregressive models
Journal of Forecasting, Vol. 30, No. 8, pp. 679-752
Michał Majsterek, Aleksander Welfe
Price-wage nexus and the role of a tax system
Economic Change and Restructuring, Vol. 45, No. 1-2 , 2012, pp.121-133
Piotr Kębłowski, Aleksander Welfe
Estimation of the equilibrium exchange rate: The CHEER approach
Journal of International Money and Finance, Vol. 29, 2010, pp. 1385-1397