Ciżkowicz, Piotr and Rzońca, Andrzej (2010): Inflation and corporate investment in selected OECD countries in the years 1960-2005 – an empirical analysis. Unpublished.
Ciżkowicz, Piotr; Hołda, Marcin and Rzońca, Andrzej (2009): Inflation and investment in monetary growth models. Unpublished.
Borys, Paweł; Ciżkowicz, Piotr and Rzońca, Andrzej (2011): Panel data evidence on non-Keynesian efects of fiscal policy in the EU New Member. Unpublished.
Ciżkowicz, Piotr; Hołda, Marcin and Sowa, Urszula (2007): The new wave of polish migration after EU enlargement - current state, determinants and outlook. Unpublished.