Price Regulation, Quality Competition and Location Choice with Costly Relocation
B. Hehenkamp, O.M. Kaarbøe, Price Regulation, Quality Competition and Location Choice with Costly Relocation, n.d.

The Impact of Product Differentiation on Retail Bundling in a Vertical Market
A.E. Endres-Fröhlich, B. Hehenkamp, J. Heinzel, The Impact of Product Differentiation on Retail Bundling in a Vertical Market, n.d.