Notes, Comments and Preliminary results Dec 13 2002 Gonzalo Olcina , Antoni Cunyat and Vicent Calabuig   Bargaining with partially revocable commitments: a simple model   Abstract  Contact Information  Citation  Full Text  -  Note   Feb 18 2002 Concepción Peñarrubia and Gonzalo Olcina   Specific investments and coordination failures   Abstract  Contact Information  Citation  Full Text  -  Note