This paper presents an analysis of fiscal and monetary policies in the IS/LM model that relies only on simple reductio ad absurdum arguments. It is done in a version of the IS/LM model which is rather general, without using differential calculus or linear algebra

We analyze an environment plagued by double moral hazard where the worker's effort level and the employer's monitoring level are not contractible. In such an environment, the employer tends to over-monitor thereby inducing low effort. To ease the latter problem, the employer may choose to...