Estimation of indifference curves in the Marschak-Machina triangle a direct test of the “fanning out” hypothesis

The ongoing debate on the correct modelling of economic behaviour under risk makes heavy expositional use of the 'Marschak-Machina Triangle'. This has also been used when constructing tests of the various competing theories. In this paper, we adopt a more direct approach - by estimating subjects' indifference maps in the Triangle. Employing an interview technique, we find that most subjects have maps which are nearly consistent with those implied by Subjective Expected Utility theory.