We propose a simple mechanism that implements the Ordinal Shapley Value (PérezCastrillo and Wettstein [2005]) for economies with three or less agents. JEL Classification numbers: C72, D50, D63.

One year after Herbert Simon’s death, this paper tries to highlight the most relevant elements for economists in his scientific heritage. JEL Classification: B31

Article history: Received 22 February 2010 Received in revised form 6 December 2010 Accepted 10 December 2010 JEL classification: E10 L16 O31 O40

Article history: Received 13 January 2011 Received in revised form 7 May 2014 Available online xxxx JEL classification: D51 E20 E32 E63

We introduce a notion of complete monotone quasiconcave duality and we show that it holds for important classes of quasiconcave functions. JEL classification: C65

We combine general equilibrium theory and théorie générale of stochastic processes to derive structural results about equilibrium state prices. JEL Classification: D51, D91, G10, G12

Article history: Received 6 February 2008 Accepted 14 May 2008 Available online 20 May 2008 JEL classification: C63 G11 G31 G39

Article history: Received 16 November 2009 Received in revised form 12 August 2010 Accepted 20 August 2010 Available online 21 October 2010 JEL classification: C72 C92 D80 D84

We examine equilibria individuals take unobs incentives in the insura individuals differ only productivities. Under t risk-productivity types generally differ from Wambach (2000). We JEL Classification :

Article history: Received 29 July 2008 Received in revised form 15 December 2009 Accepted 17 December 2009 Available online xxxx JEL classification: D81 Q42