On Intertemporal Allocation Behavior – A Selective Survey of Saving Experiments, ifo Studien 3, 1999, 303-334 (with Werner Güth).

An Experimental Analysis of Intertemporal Allocation Behavior, Experimental Economics 3, 2000, 137-152 (with Werner Güth, Wieland Müller, and Martin Strobel).

On the Interaction of Risk and Time Preferences: An Experimental Study, German Economic Review 2(3), 2001, 239-252 (with Uri Gneezy, Werner Güth, and Doron Sonsino).

Design and Evaluation of an Economic Experiment via the Internet, Journal of Economic Behavior & Organization, Vol. 46, 2001, 227-247 (with Rudolf Müller and Carsten Schmidt).

Tax Evasion with Earned Income – An Experimental Study, FinanzArchiv, Vol. 58, 2001, 188-206 (with Sebastian Giese, Antje Hoffmann, Werner Güth and Thomas Otto).

An Experimental Study of Saving and Investing in a Complex Stochastic Environment, in: Experimental Business Research, Kluwer Academic Publishers, 2002, 3-20 (with Werner Güth and Florian Knust).

An Experimental Study of the Repeated Trust Game with Incomplete Information, Journal of Economic Behavior & Organization, Vol. 46, 2002, 197-216 (with Dirk Engelmann and Werner Güth).

Efficient Contracting and Fair Play in a Simple Principle-Agent Experiment, Experimental Economics 5, 2002, 5-27 (with Simon Gächter and Manfred Königstein).

Long-term work contracts versus sequential spot markets: experimental evidence on firm-specific investment, Labour Economics, Special Issue on Labour Market Experiments, Vol. 10, Issue 4, 2003, 407-425 (with Manfred Königstein and Dorothea Kübler).

Capacity Choices and Price Competition in Experimental Markets, Experimental Economics, 6, 2003, 27-52 (with Werner Güth, Ulrich Kamecke, and Hans-Theo Normann).

Early or Late Conflict Settlement in a Variety of Games –An Experimental Study–, Journal of Economic Psychology, Vol. 25, Issue 2, 2004, 177-194 (with Werner Güth and Nadège Marchand).